How to Reboot Android Phones and Tablets To reboot your Android phone manually, hold down the Power button until the power menu pops up and tap Restart.

Emergency Restart is a 'last resort' method that forcefully resets your computer when it's stuck in a loop.

Essentially, when you restart your computer you're clearing off the current state of your software and starting over again. You're basically dumping out the junk and starting over again fresh.