wifi and mobile data disconnects when screen goes off even with wifi ALWAYS ON mode

My wifi and data connection disconnects when screen goes off on my huawei ascend mate 2. For samsung phones it can be solved with secret codes like ##0011# but for huawei phones the secret codes are not working. or do you know a working secret code on hardware level for this? my power save mode is off. wifi is set on always on mode. auto synchronisation is on. my apps can all run in background. So I have set off all possible energy saving option for all apps. besides I have downloaded apps to keep wifi always on. but when I put it on always on mode on this app. It mentions that the wifi set on always on mode. but after 2 seconds I open the app (wifi always on app) it says that the wifi is on saving mode and not in always on mode. So there is another more dominant program (probably the huawei custom ROM) who has more privileges than a normal app so that it avoids that wifi is on always on mode.

Sometimes even when the screen is on, viber whatsapp does not receive calls or messages you should launch the app to receive calls and messages. you would say that it is a synchronisation problem. No. No. sync is on for all accounts. all accounts have full access on all my data and on the battery. All settings about battery saving options are set off.