When your phone is in safe mode, it only loads pre-installed applications and will not load any apps added later by the end-user. After entering safe mode, use your phone as normal and check if the problem persists.
Enter Safe Mode
1. Press and hold the power key for a few seconds.
2. Tap and hold power-off icon until Reboot to safe mode appears.
3. Select OK.
4. The device will reboot to safe mode.
Exit Safe Mode
1. Press and hold the power key for a few seconds.
2. Tap Restart.
3. The device will reboot normally.
Note: If the issue did not continue in safe mode, then please first try to identify problem apps here.
If no problem app could be found, then please back up and reset your phone.