Calls and contacts
Office and leisure
Global online services
Cause 1 of 3: If you experience that your phone is running slowly or if applications are not responding, it may be because the memory is full. Follow this guide if your phone is running low on memory.
If there are too many applications open, it may cause an application not to respond.
Solution: Close one or more open applications.
End active applications
Press and hold the Home key.
Press and hold the required application.
Press App info.
Press Force stop.