It can help you to save any Important things Without Bug of the Stock/Custom Rom. As we could reboot our computers, we can also reboot Android phones in safe mode called Android Safe Mode. The latest Android- Marshmallow version provides an option to reboot your device in safe mode if something goes wrong.To reboot your android device in safe mode, follow the below given instructions.
*Long press the power button
*Long press on the power off option. (This will help in hunting down the problem causing application)
Android phone will show a confirmation message about rebooting it in safe mode. If we reboot android phone in safe mode then all the 3rd party applications will be disabled. These applications can again be enabled when we reboot our phone normally. This is a great Android utility in case when one of your 3rd party application is causing serious trouble and you want to hunt it down.