diff --git a/app/src/main/java/com/nextcloud/talk/components/filebrowser/operations/DavListing.java b/app/src/main/java/com/nextcloud/talk/components/filebrowser/operations/DavListing.java
index e5ea94e91..38399344c 100644
--- a/app/src/main/java/com/nextcloud/talk/components/filebrowser/operations/DavListing.java
+++ b/app/src/main/java/com/nextcloud/talk/components/filebrowser/operations/DavListing.java
@@ -47,7 +47,7 @@ public class DavListing extends ListingAbstractClass {
             public ReadFilesystemOperation call() {
                 return new ReadFilesystemOperation(okHttpClient, currentUser, path, 1);
             }
-        }).subscribeOn(Schedulers.newThread())
+        }).subscribeOn(Schedulers.io())
                 .subscribe(new SingleObserver<ReadFilesystemOperation>() {
                     @Override
                     public void onSubscribe(Disposable d) {
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/AccountVerificationController.java b/app/src/main/java/com/nextcloud/talk/controllers/AccountVerificationController.java
index 300a56892..c4f07b0be 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/AccountVerificationController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/AccountVerificationController.java
@@ -176,7 +176,7 @@ public class AccountVerificationController extends BaseController {
         }
 
         ncApi.getServerStatus(queryUrl)
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<Status>() {
                     @Override
@@ -220,7 +220,7 @@ public class AccountVerificationController extends BaseController {
 
     private void findServerTalkApp(String credentials) {
         ncApi.getRooms(credentials, ApiUtils.getUrlForGetRooms(baseUrl))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .subscribe(new Observer<RoomsOverall>() {
                     @Override
                     public void onSubscribe(Disposable d) {
@@ -257,7 +257,7 @@ public class AccountVerificationController extends BaseController {
                 baseUrl, displayName, null, true,
                 userId, null, null,
                 appPreferences.getTemporaryClientCertAlias(), null)
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .subscribe(new Observer<UserEntity>() {
                     @Override
                     public void onSubscribe(Disposable d) {
@@ -297,7 +297,7 @@ public class AccountVerificationController extends BaseController {
     private void fetchProfile(String credentials) {
         ncApi.getUserProfile(credentials,
                 ApiUtils.getUrlForUserProfile(baseUrl))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .subscribe(new Observer<UserProfileOverall>() {
                     @Override
                     public void onSubscribe(Disposable d) {
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/CallController.java b/app/src/main/java/com/nextcloud/talk/controllers/CallController.java
index cae0ff978..b668ca32f 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/CallController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/CallController.java
@@ -340,7 +340,7 @@ public class CallController extends BaseController {
     private void handleFromNotification() {
         ncApi.getRooms(credentials, ApiUtils.getUrlForGetRooms(baseUrl))
                 .retry(3)
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<RoomsOverall>() {
                     @Override
@@ -863,7 +863,7 @@ public class CallController extends BaseController {
         leavingCall = false;
 
         ncApi.getSignalingSettings(credentials, ApiUtils.getUrlForSignalingSettings(baseUrl))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .retry(3)
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<SignalingSettingsOverall>() {
@@ -894,7 +894,7 @@ public class CallController extends BaseController {
                                 try {
                                     userUtils.createOrUpdateUser(null, null, null, null, null, null, null,
                                             conversationUser.getId(), null, null, LoganSquare.serialize(externalSignalingServer))
-                                            .subscribeOn(Schedulers.newThread())
+                                            .subscribeOn(Schedulers.io())
                                             .subscribe();
                                 } catch (IOException exception) {
                                     Log.e(TAG, "Failed to serialize external signaling server");
@@ -949,7 +949,7 @@ public class CallController extends BaseController {
     private void checkCapabilities() {
         ncApi.getCapabilities(credentials, ApiUtils.getUrlForCapabilities(baseUrl))
                 .retry(3)
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<CapabilitiesOverall>() {
                     @Override
@@ -999,7 +999,7 @@ public class CallController extends BaseController {
     private void joinRoomAndCall() {
         ncApi.joinRoom(credentials, ApiUtils.getUrlForSettingMyselfAsActiveParticipant(baseUrl,
                 roomToken), conversationPassword)
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .retry(3)
                 .subscribe(new Observer<CallOverall>() {
@@ -1041,7 +1041,7 @@ public class CallController extends BaseController {
     private void performCall() {
         ncApi.joinCall(credentials,
                 ApiUtils.getUrlForCall(baseUrl, roomToken))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .retry(3)
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<GenericOverall>() {
@@ -1070,7 +1070,7 @@ public class CallController extends BaseController {
 
                         if (needsPing) {
                             ncApi.pingCall(credentials, ApiUtils.getUrlForCallPing(baseUrl, roomToken))
-                                    .subscribeOn(Schedulers.newThread())
+                                    .subscribeOn(Schedulers.io())
                                     .observeOn(AndroidSchedulers.mainThread())
                                     .repeatWhen(observable -> observable.delay(5000, TimeUnit.MILLISECONDS))
                                     .takeWhile(observable -> inCall)
@@ -1108,7 +1108,7 @@ public class CallController extends BaseController {
 
                         if (!hasExternalSignalingServer) {
                             ncApi.pullSignalingMessages(credentials, ApiUtils.getUrlForSignaling(baseUrl, urlToken))
-                                    .subscribeOn(Schedulers.newThread())
+                                    .subscribeOn(Schedulers.io())
                                     .observeOn(AndroidSchedulers.mainThread())
                                     .repeatWhen(observable -> observable)
                                     .takeWhile(observable -> inCall)
@@ -1358,7 +1358,7 @@ public class CallController extends BaseController {
 
     private void hangupNetworkCalls() {
         ncApi.leaveCall(credentials, ApiUtils.getUrlForCall(baseUrl, roomToken))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<GenericOverall>() {
                     @Override
@@ -1395,7 +1395,7 @@ public class CallController extends BaseController {
 
     private void leaveRoom() {
         ncApi.leaveRoom(credentials, ApiUtils.getUrlForSettingMyselfAsActiveParticipant(baseUrl, roomToken))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<GenericOverall>() {
                     @Override
@@ -1483,7 +1483,7 @@ public class CallController extends BaseController {
 
     private void getPeersForCall() {
         ncApi.getPeersForCall(credentials, ApiUtils.getUrlForCall(baseUrl, roomToken))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .subscribe(new Observer<ParticipantsOverall>() {
                     @Override
                     public void onSubscribe(Disposable d) {
@@ -1675,7 +1675,7 @@ public class CallController extends BaseController {
                 Observable
                         .interval(1, TimeUnit.SECONDS)
                         .takeWhile(observer -> inCall)
-                        .observeOn(Schedulers.newThread())
+                        .observeOn(Schedulers.io())
                         .doOnNext(n -> magicPeerConnectionWrapperList.get(finalI).sendChannelData(dataChannelMessage));
                 break;
             }
@@ -1743,7 +1743,7 @@ public class CallController extends BaseController {
             ncApi.sendSignalingMessages(credentials, ApiUtils.getUrlForSignaling(baseUrl, urlToken),
                     strings.toString())
                     .retry(3)
-                    .subscribeOn(Schedulers.newThread())
+                    .subscribeOn(Schedulers.io())
                     .subscribe(new Observer<SignalingOverall>() {
                         @Override
                         public void onSubscribe(Disposable d) {
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/CallNotificationController.java b/app/src/main/java/com/nextcloud/talk/controllers/CallNotificationController.java
index 449ae22a5..3ccbab63b 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/CallNotificationController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/CallNotificationController.java
@@ -197,7 +197,7 @@ public class CallNotificationController extends BaseController {
     private void checkIfAnyParticipantsRemainInRoom() {
         ncApi.getPeersForCall(credentials, ApiUtils.getUrlForParticipants(userBeingCalled.getBaseUrl(),
                 currentConversation.getToken()))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .takeWhile(observable -> !leavingScreen)
                 .retry(3)
                 .subscribe(new Observer<ParticipantsOverall>() {
@@ -246,7 +246,7 @@ public class CallNotificationController extends BaseController {
 
     private void handleFromNotification() {
         ncApi.getRooms(credentials, ApiUtils.getUrlForGetRooms(userBeingCalled.getBaseUrl()))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .retry(3)
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<RoomsOverall>() {
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java b/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java
index 08dc54daa..f76f79207 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java
@@ -213,7 +213,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
 
     private void getRoomInfo() {
         ncApi.getRoom(credentials, ApiUtils.getRoom(conversationUser.getBaseUrl(), roomToken))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<RoomOverall>() {
                     @Override
@@ -246,7 +246,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
 
     private void handleFromNotification() {
         ncApi.getRooms(credentials, ApiUtils.getUrlForGetRooms(conversationUser.getBaseUrl()))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<RoomsOverall>() {
                     @Override
@@ -621,7 +621,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
     private void startPing() {
         if (!conversationUser.hasSpreedCapabilityWithName("no-ping")) {
             ncApi.pingCall(credentials, ApiUtils.getUrlForCallPing(conversationUser.getBaseUrl(), roomToken))
-                    .subscribeOn(Schedulers.newThread())
+                    .subscribeOn(Schedulers.io())
                     .observeOn(AndroidSchedulers.mainThread())
                     .repeatWhen(observable -> observable.delay(5000, TimeUnit.MILLISECONDS))
                     .takeWhile(observable -> inChat)
@@ -666,7 +666,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
         if (currentCall == null) {
             ncApi.joinRoom(credentials,
                     ApiUtils.getUrlForSettingMyselfAsActiveParticipant(conversationUser.getBaseUrl(), roomToken), roomPassword)
-                    .subscribeOn(Schedulers.newThread())
+                    .subscribeOn(Schedulers.io())
                     .observeOn(AndroidSchedulers.mainThread())
                     .retry(3)
                     .subscribe(new Observer<CallOverall>() {
@@ -719,7 +719,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
         ncApi.leaveRoom(credentials,
                 ApiUtils.getUrlForSettingMyselfAsActiveParticipant(conversationUser.getBaseUrl(),
                         roomToken))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<GenericOverall>() {
                     @Override
@@ -777,7 +777,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
         ncApi.sendChatMessage(credentials, ApiUtils.getUrlForChat(conversationUser.getBaseUrl(), roomToken),
                 message, conversationUser
                         .getDisplayName())
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<GenericOverall>() {
                     @Override
@@ -850,7 +850,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
                 ncApi.pullChatMessages(credentials, ApiUtils.getUrlForChat(conversationUser.getBaseUrl(),
                         roomToken),
                         fieldMap)
-                        .subscribeOn(Schedulers.newThread())
+                        .subscribeOn(Schedulers.io())
                         .observeOn(AndroidSchedulers.mainThread())
                         .takeWhile(observable -> inChat && !wasDetached)
                         .retry(3, observable -> inChat && !wasDetached)
@@ -879,7 +879,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
             } else {
                 ncApi.pullChatMessages(credentials,
                         ApiUtils.getUrlForChat(conversationUser.getBaseUrl(), roomToken), fieldMap)
-                        .subscribeOn(Schedulers.newThread())
+                        .subscribeOn(Schedulers.io())
                         .observeOn(AndroidSchedulers.mainThread())
                         .retry(3, observable -> inChat && !wasDetached)
                         .takeWhile(observable -> inChat && !wasDetached)
@@ -1201,7 +1201,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
 
             ncApi.createRoom(credentials,
                     retrofitBucket.getUrl(), retrofitBucket.getQueryMap())
-                    .subscribeOn(Schedulers.newThread())
+                    .subscribeOn(Schedulers.io())
                     .observeOn(AndroidSchedulers.mainThread())
                     .subscribe(new Observer<RoomOverall>() {
                         @Override
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/ContactsController.java b/app/src/main/java/com/nextcloud/talk/controllers/ContactsController.java
index 065220430..3ad3f31f3 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/ContactsController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/ContactsController.java
@@ -253,7 +253,7 @@ public class ContactsController extends BaseController implements SearchView.OnQ
                         ((UserItem) selectedObject).getModel().getUserId(), null);
                 ncApi.createRoom(credentials,
                         retrofitBucket.getUrl(), retrofitBucket.getQueryMap())
-                        .subscribeOn(Schedulers.newThread())
+                        .subscribeOn(Schedulers.io())
                         .observeOn(AndroidSchedulers.mainThread())
                         .subscribe(new Observer<RoomOverall>() {
                             @Override
@@ -447,7 +447,7 @@ public class ContactsController extends BaseController implements SearchView.OnQ
         ncApi.getContactsWithSearchParam(
                 credentials,
                 retrofitBucket.getUrl(), shareTypesList, modifiedQueryMap)
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .retry(3)
                 .subscribe(new Observer<ResponseBody>() {
@@ -865,7 +865,7 @@ public class ContactsController extends BaseController implements SearchView.OnQ
 
                 ncApi.createRoom(credentials,
                         retrofitBucket.getUrl(), retrofitBucket.getQueryMap())
-                        .subscribeOn(Schedulers.newThread())
+                        .subscribeOn(Schedulers.io())
                         .observeOn(AndroidSchedulers.mainThread())
                         .subscribe(new Observer<RoomOverall>() {
                             @Override
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/ConversationInfoController.java b/app/src/main/java/com/nextcloud/talk/controllers/ConversationInfoController.java
index 5712820bd..bd5f8d77f 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/ConversationInfoController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/ConversationInfoController.java
@@ -280,7 +280,7 @@ public class ConversationInfoController extends BaseController {
 
     private void getListOfParticipants() {
         ncApi.getPeersForCall(credentials, ApiUtils.getUrlForParticipants(conversationUser.getBaseUrl(), conversationToken))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<ParticipantsOverall>() {
                     @Override
@@ -351,7 +351,7 @@ public class ConversationInfoController extends BaseController {
 
     private void fetchRoomInfo() {
         ncApi.getRoom(credentials, ApiUtils.getRoom(conversationUser.getBaseUrl(), conversationToken))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<RoomOverall>() {
                     @Override
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/ConversationsListController.java b/app/src/main/java/com/nextcloud/talk/controllers/ConversationsListController.java
index 9292e9f04..1511d6b4d 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/ConversationsListController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/ConversationsListController.java
@@ -314,7 +314,7 @@ public class ConversationsListController extends BaseController implements Searc
         callItems = new ArrayList<>();
 
         roomsQueryDisposable = ncApi.getRooms(credentials, ApiUtils.getUrlForGetRooms(currentUser.getBaseUrl()))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(roomsOverall -> {
 
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/ServerSelectionController.java b/app/src/main/java/com/nextcloud/talk/controllers/ServerSelectionController.java
index 6f1833dad..ec0aa3c54 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/ServerSelectionController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/ServerSelectionController.java
@@ -246,7 +246,7 @@ public class ServerSelectionController extends BaseController {
 
     private void checkServer(String queryUrl, boolean checkForcedHttps) {
         statusQueryDisposable = ncApi.getServerStatus(queryUrl)
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(status -> {
                     String productName = getResources().getString(R.string.nc_server_product_name);
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java b/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java
index 47568ac83..6a3491b3e 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java
@@ -494,7 +494,7 @@ public class SettingsController extends BaseController {
 
             profileQueryDisposable = ncApi.getUserProfile(credentials,
                     ApiUtils.getUrlForUserProfile(currentUser.getBaseUrl()))
-                    .subscribeOn(Schedulers.newThread())
+                    .subscribeOn(Schedulers.io())
                     .observeOn(AndroidSchedulers.mainThread())
                     .subscribe(userProfileOverall -> {
 
@@ -516,7 +516,7 @@ public class SettingsController extends BaseController {
                                     null,
                                     null, displayName, null, null,
                                     null, currentUser.getId(), null, null, null)
-                                    .subscribeOn(Schedulers.newThread())
+                                    .subscribeOn(Schedulers.io())
                                     .observeOn(AndroidSchedulers.mainThread())
                                     .subscribe(userEntityResult -> {
                                                 displayNameTextView.setText(userEntityResult.getDisplayName());
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/WebViewLoginController.java b/app/src/main/java/com/nextcloud/talk/controllers/WebViewLoginController.java
index 9e9984fa5..89b0fc747 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/WebViewLoginController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/WebViewLoginController.java
@@ -368,7 +368,7 @@ public class WebViewLoginController extends BaseController {
                         userQueryDisposable = userUtils.createOrUpdateUser(null, loginData.getToken(),
                                 null, null, "", true,
                                 null, currentUser.getId(), null, appPreferences.getTemporaryClientCertAlias(), null)
-                                .subscribeOn(Schedulers.newThread())
+                                .subscribeOn(Schedulers.io())
                                 .observeOn(AndroidSchedulers.mainThread())
                                 .subscribe(userEntity -> {
                                             if (finalMessageType != null) {
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/OperationsMenuController.java b/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/OperationsMenuController.java
index 92f8ae306..7468ac9bf 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/OperationsMenuController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/OperationsMenuController.java
@@ -191,7 +191,7 @@ public class OperationsMenuController extends BaseController {
                 case 2:
                     ncApi.renameRoom(credentials, ApiUtils.getRoom(currentUser.getBaseUrl(), conversation.getToken()),
                             conversation.getName())
-                            .subscribeOn(Schedulers.newThread())
+                            .subscribeOn(Schedulers.io())
                             .observeOn(AndroidSchedulers.mainThread())
                             .retry(1)
                             .subscribe(operationsObserver);
@@ -199,7 +199,7 @@ public class OperationsMenuController extends BaseController {
                 case 3:
                     ncApi.makeRoomPublic(credentials, ApiUtils.getUrlForRoomVisibility(currentUser.getBaseUrl(), conversation
                             .getToken()))
-                            .subscribeOn(Schedulers.newThread())
+                            .subscribeOn(Schedulers.io())
                             .observeOn(AndroidSchedulers.mainThread())
                             .retry(1)
                             .subscribe(operationsObserver);
@@ -213,7 +213,7 @@ public class OperationsMenuController extends BaseController {
                     }
                     ncApi.setPassword(credentials, ApiUtils.getUrlForPassword(currentUser.getBaseUrl(),
                             conversation.getToken()), pass)
-                            .subscribeOn(Schedulers.newThread())
+                            .subscribeOn(Schedulers.io())
                             .observeOn(AndroidSchedulers.mainThread())
                             .retry(1)
                             .subscribe(operationsObserver);
@@ -224,14 +224,14 @@ public class OperationsMenuController extends BaseController {
                 case 8:
                     ncApi.makeRoomPrivate(credentials, ApiUtils.getUrlForRoomVisibility(currentUser.getBaseUrl(), conversation
                             .getToken()))
-                            .subscribeOn(Schedulers.newThread())
+                            .subscribeOn(Schedulers.io())
                             .observeOn(AndroidSchedulers.mainThread())
                             .retry(1)
                             .subscribe(operationsObserver);
                     break;
                 case 10:
                     ncApi.getRoom(credentials, ApiUtils.getRoom(baseUrl, conversationToken))
-                            .subscribeOn(Schedulers.newThread())
+                            .subscribeOn(Schedulers.io())
                             .observeOn(AndroidSchedulers.mainThread())
                             .retry(1)
                             .subscribe(new Observer<RoomOverall>() {
@@ -284,7 +284,7 @@ public class OperationsMenuController extends BaseController {
 
                     final boolean isGroupCallWorkaroundFinal = isGroupCallWorkaround;
                     ncApi.createRoom(credentials, retrofitBucket.getUrl(), retrofitBucket.getQueryMap())
-                            .subscribeOn(Schedulers.newThread())
+                            .subscribeOn(Schedulers.io())
                             .observeOn(AndroidSchedulers.mainThread())
                             .retry(1)
                             .subscribe(new Observer<RoomOverall>() {
@@ -321,14 +321,14 @@ public class OperationsMenuController extends BaseController {
                     if (operationCode == 97) {
                         ncApi.removeConversationFromFavorites(credentials, ApiUtils.getUrlForConversationFavorites(currentUser.getBaseUrl(),
                                 conversation.getToken()))
-                                .subscribeOn(Schedulers.newThread())
+                                .subscribeOn(Schedulers.io())
                                 .observeOn(AndroidSchedulers.mainThread())
                                 .retry(1)
                                 .subscribe(operationsObserver);
                     } else {
                         ncApi.addConversationToFavorites(credentials, ApiUtils.getUrlForConversationFavorites(currentUser.getBaseUrl(),
                                 conversation.getToken()))
-                                .subscribeOn(Schedulers.newThread())
+                                .subscribeOn(Schedulers.io())
                                 .observeOn(AndroidSchedulers.mainThread())
                                 .retry(1)
                                 .subscribe(operationsObserver);
@@ -337,7 +337,7 @@ public class OperationsMenuController extends BaseController {
                 case 99:
                     ncApi.joinRoom(credentials, ApiUtils.getUrlForSettingMyselfAsActiveParticipant(baseUrl, conversationToken),
                             callPassword)
-                            .subscribeOn(Schedulers.newThread())
+                            .subscribeOn(Schedulers.io())
                             .observeOn(AndroidSchedulers.mainThread())
                             .retry(1)
                             .subscribe(operationsObserver);
@@ -350,7 +350,7 @@ public class OperationsMenuController extends BaseController {
 
     private void performGroupCallWorkaround(String credentials) {
         ncApi.makeRoomPrivate(credentials, ApiUtils.getUrlForRoomVisibility(currentUser.getBaseUrl(), conversation.getToken()))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .retry(1)
                 .subscribe(new Observer<GenericOverall>() {
@@ -438,7 +438,7 @@ public class OperationsMenuController extends BaseController {
 
     private void fetchCapabilities(String credentials) {
         ncApi.getCapabilities(credentials, ApiUtils.getUrlForCapabilities(baseUrl))
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<CapabilitiesOverall>() {
                     @Override
@@ -512,7 +512,7 @@ public class OperationsMenuController extends BaseController {
                             groupId);
 
                     ncApi.addParticipant(credentials, retrofitBucket.getUrl(), retrofitBucket.getQueryMap())
-                            .subscribeOn(Schedulers.newThread())
+                            .subscribeOn(Schedulers.io())
                             .observeOn(AndroidSchedulers.mainThread())
                             .retry(1)
                             .subscribe(new Observer<AddParticipantOverall>() {
@@ -552,7 +552,7 @@ public class OperationsMenuController extends BaseController {
                         userId);
 
                 ncApi.addParticipant(credentials, retrofitBucket.getUrl(), retrofitBucket.getQueryMap())
-                        .subscribeOn(Schedulers.newThread())
+                        .subscribeOn(Schedulers.io())
                         .observeOn(AndroidSchedulers.mainThread())
                         .retry(1)
                         .subscribe(new Observer<AddParticipantOverall>() {
diff --git a/app/src/main/java/com/nextcloud/talk/jobs/DeleteConversationWorker.java b/app/src/main/java/com/nextcloud/talk/jobs/DeleteConversationWorker.java
index f69c3e6d8..e77f90e4e 100644
--- a/app/src/main/java/com/nextcloud/talk/jobs/DeleteConversationWorker.java
+++ b/app/src/main/java/com/nextcloud/talk/jobs/DeleteConversationWorker.java
@@ -83,7 +83,7 @@ public class DeleteConversationWorker extends Worker {
                     EventStatus.EventType.CONVERSATION_UPDATE, true);
 
             ncApi.deleteRoom(credentials, ApiUtils.getRoom(operationUser.getBaseUrl(), conversationToken))
-                    .subscribeOn(Schedulers.newThread())
+                    .subscribeOn(Schedulers.io())
                     .blockingSubscribe(new Observer<GenericOverall>() {
                         Disposable disposable;
 
diff --git a/app/src/main/java/com/nextcloud/talk/jobs/LeaveConversationWorker.java b/app/src/main/java/com/nextcloud/talk/jobs/LeaveConversationWorker.java
index 4cf4716ef..849314dce 100644
--- a/app/src/main/java/com/nextcloud/talk/jobs/LeaveConversationWorker.java
+++ b/app/src/main/java/com/nextcloud/talk/jobs/LeaveConversationWorker.java
@@ -83,7 +83,7 @@ public class LeaveConversationWorker extends Worker {
                     EventStatus.EventType.CONVERSATION_UPDATE, true);
 
             ncApi.removeSelfFromRoom(credentials, ApiUtils.getUrlForRemoveSelfFromRoom(operationUser.getBaseUrl(), conversationToken))
-                    .subscribeOn(Schedulers.newThread())
+                    .subscribeOn(Schedulers.io())
                     .blockingSubscribe(new Observer<GenericOverall>() {
                         Disposable disposable;
 
diff --git a/app/src/main/java/com/nextcloud/talk/jobs/ShareOperationWorker.java b/app/src/main/java/com/nextcloud/talk/jobs/ShareOperationWorker.java
index b128cfdbe..0a4d4373f 100644
--- a/app/src/main/java/com/nextcloud/talk/jobs/ShareOperationWorker.java
+++ b/app/src/main/java/com/nextcloud/talk/jobs/ShareOperationWorker.java
@@ -76,7 +76,7 @@ public class ShareOperationWorker extends Worker {
                     filesArray.get(i),
                     roomToken,
                     "10")
-                    .subscribeOn(Schedulers.newThread())
+                    .subscribeOn(Schedulers.io())
                     .blockingSubscribe(new Observer<Void>() {
                         @Override
                         public void onSubscribe(Disposable d) {
diff --git a/app/src/main/java/com/nextcloud/talk/presenters/MentionAutocompletePresenter.java b/app/src/main/java/com/nextcloud/talk/presenters/MentionAutocompletePresenter.java
index 2f7445d15..ebfb6f922 100644
--- a/app/src/main/java/com/nextcloud/talk/presenters/MentionAutocompletePresenter.java
+++ b/app/src/main/java/com/nextcloud/talk/presenters/MentionAutocompletePresenter.java
@@ -95,7 +95,7 @@ public class MentionAutocompletePresenter extends RecyclerViewPresenter<Mention>
         ncApi.getMentionAutocompleteSuggestions(ApiUtils.getCredentials(currentUser.getUsername(), currentUser
                         .getToken()), ApiUtils.getUrlForMentionSuggestions(currentUser.getBaseUrl(), roomToken),
                 queryString, 5)
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .retry(3)
                 .subscribe(new Observer<MentionOverall>() {
diff --git a/app/src/main/java/com/nextcloud/talk/utils/PushUtils.java b/app/src/main/java/com/nextcloud/talk/utils/PushUtils.java
index 11c5e919e..71f2619c6 100644
--- a/app/src/main/java/com/nextcloud/talk/utils/PushUtils.java
+++ b/app/src/main/java/com/nextcloud/talk/utils/PushUtils.java
@@ -271,7 +271,7 @@ public class PushUtils {
 
                                             ncApi.registerDeviceForNotificationsWithProxy(finalCredentials,
                                                     ApiUtils.getUrlPushProxy(), proxyMap)
-                                                    .subscribeOn(Schedulers.newThread())
+                                                    .subscribeOn(Schedulers.io())
                                                     .subscribe(new Observer<Void>() {
                                                         @Override
                                                         public void onSubscribe(Disposable d) {
diff --git a/app/src/main/java/com/nextcloud/talk/utils/database/arbitrarystorage/ArbitraryStorageUtils.java b/app/src/main/java/com/nextcloud/talk/utils/database/arbitrarystorage/ArbitraryStorageUtils.java
index afb33a331..d9db2d559 100644
--- a/app/src/main/java/com/nextcloud/talk/utils/database/arbitrarystorage/ArbitraryStorageUtils.java
+++ b/app/src/main/java/com/nextcloud/talk/utils/database/arbitrarystorage/ArbitraryStorageUtils.java
@@ -46,7 +46,7 @@ public class ArbitraryStorageUtils {
 
         dataStore.upsert(arbitraryStorageEntity)
                 .toObservable()
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .subscribe();
     }
 
@@ -63,6 +63,6 @@ public class ArbitraryStorageUtils {
         ReactiveScalar<Integer> deleteResult = dataStore.delete(ArbitraryStorage.class).where(ArbitraryStorageEntity.ACCOUNT_IDENTIFIER.eq(accountIdentifier)).get();
 
         return deleteResult.single().toObservable()
-                .subscribeOn(Schedulers.newThread());
+                .subscribeOn(Schedulers.io());
     }
 }
diff --git a/app/src/main/java/com/nextcloud/talk/utils/database/user/UserUtils.java b/app/src/main/java/com/nextcloud/talk/utils/database/user/UserUtils.java
index 9e08993be..bf6b174ad 100644
--- a/app/src/main/java/com/nextcloud/talk/utils/database/user/UserUtils.java
+++ b/app/src/main/java/com/nextcloud/talk/utils/database/user/UserUtils.java
@@ -90,7 +90,7 @@ public class UserUtils {
         UserEntity user = (UserEntity) findUserQueryResult.firstOrNull();
 
         return dataStore.delete(user)
-                .subscribeOn(Schedulers.newThread())
+                .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread());
 
     }
@@ -101,7 +101,7 @@ public class UserUtils {
         UserEntity user = (UserEntity) findUserQueryResult.firstOrNull();
 
         return dataStore.delete(user)
-                .subscribeOn(Schedulers.newThread());
+                .subscribeOn(Schedulers.io());
 
     }
 
@@ -264,7 +264,7 @@ public class UserUtils {
 
         return dataStore.upsert(user)
                 .toObservable()
-                .subscribeOn(Schedulers.newThread());
+                .subscribeOn(Schedulers.io());
     }
 
 }
diff --git a/app/src/main/java/com/nextcloud/talk/utils/preferencestorage/DatabaseStorageModule.java b/app/src/main/java/com/nextcloud/talk/utils/preferencestorage/DatabaseStorageModule.java
index 639efd45d..2b926138f 100644
--- a/app/src/main/java/com/nextcloud/talk/utils/preferencestorage/DatabaseStorageModule.java
+++ b/app/src/main/java/com/nextcloud/talk/utils/preferencestorage/DatabaseStorageModule.java
@@ -89,7 +89,7 @@ public class DatabaseStorageModule implements StorageModule {
                     ncApi.setNotificationLevel(ApiUtils.getCredentials(conversationUser.getUsername(), conversationUser.getToken()),
                             ApiUtils.getUrlForSettingNotificationlevel(conversationUser.getBaseUrl(), conversationToken),
                             intValue)
-                            .subscribeOn(Schedulers.newThread())
+                            .subscribeOn(Schedulers.io())
                             .subscribe(new Observer<GenericOverall>() {
                                 @Override
                                 public void onSubscribe(Disposable d) {