How to Hard Reset Samsung Android Mobile Phones
Problem 1 : Stuck At Samsung Logo Screen
If you screen is frozen or you could not turn on your phone. To perform a factory reset using
the 'Recovery Mode'. This all so format your phone memory.
1. Hold the Volume up + Home + Power key at the same time
The Android recovery mode appears, select: wipe data / factory reset with the volume keys
Enter with the power key. Then restart the phone. mobile phone fully formatted.
Problem 2 : Slow Running and hanging
simple device resetting
Apps -Settings - Accounts - Factory Data Reset - Reset Device - Delete