How to use Safe Mode on Samsung Galaxy device?
If your phone is misbehaving, it's possible that a third-party app is causing the issue. To figure out what app is acting funny, you can use the Safe Mode feature. In Safe Mode, your phone won't run any third-party apps. This allows you to easily identity and remove the app that may be causing the problem.
Boot a Samsung device into Safe Mode:
Exit Safe Mode
To exit Safe Mode, simply restart your phone and it will reboot normally. You can also enter Safe Mode by pressing the Power key, touching and holding the Power off icon, and then touching the Safe Mode icon.