Try starting it up in "Safe Mode" and see if it loads fine. If it does, then there is something (malware, virus, bad app, etc.) on the phone that is the cause. You will need to find and remove the problem.
To get into "Safe Mode" please do the following.
1. First turn off the phone.
2. Next press and hold "Power" until you see the manufacturers logo on the screen, then release the power button.
3. "Quickly" press "Volume Down" and hold it for few seconds until you see the message "Safe mode: ON" or something similar.
4. If you wanted disable it, simply repeat the steps above, and you should see "Safe Mode: OFF" rather than on.
I cant go to safe mode so i just saved my important documents and formated my phone
After switching on its good ... And after that i noticed that .. The "tubemate" app is the virus after Installing that the phone beçomes this problem after uninstall the app it goes