Reboot system menu

Solution
Master reset with hardware keys
Back up all data.
Turn off the phone.
Press and hold the Volume up, Home, and Power keys.
When the phone vibrates, release the Power and Home keys.
Continue to hold down the Volume Up key.
When "Android System Recovery" appears, release the Volume up key
Master reset with hardware keys
Back up all data.
Turn off the phone.
Press and hold the Volume up, Home, and Power keys.
When the phone vibrates, release the Power and Home keys.
Continue to hold down the Volume Up key.
When "Android System Recovery" appears, release the Volume up key
 
Solution