Restart your phone
Press and hold the Power button
Tap Restart or Reboot
If your phone has a removable battery, power it off, remove the battery, wait a few seconds, reinsert it, and turn it back on
Make sure no volume button is stuck
Remove any case that may be pressing buttons
Check for a stuck Power, Volume Up, or Volume Down button
Uninstall any recently installed apps
Turn the phone off, then turn it back on normally
If Safe Mode keeps appearing, back up your data and perform a factory reset
Contact the phone manufacturer or carrier if the issue continues