I show you two ways to boot your S7 or S7 Edge into safe mode as it will depend on your carrier and model phone.
Safe mode is a diagnostic tool where it will load only the basic drivers and preloaded apps. It will not load your third party apps. If you have an issue with your S7 and the problems does not occur when you are in safe mode then good chance is a rogue app. You need to uninstall that app. You can try to re download and install that same app again to see if the problem still persists cause it may have been corrupted during the original install.
I hope this video was useful to you. I appreciate any subs. Cheers!