hard reset samsung galaxy s4 19500 i9502 i9505 i9506 i9507 i9508
1-The device must by turned off,
2- Afterwards press and hold together: Volume Up + Home button + Power button, until you see the Samsung logo.
3-Wait for the Recovery Mode.
4-Then select from menu “wipe data / factory reset” using Volume buttons to navigate and Power button to confirm.
5-Choose “Yes — delete all user data” to confirm the whole operation.Wipe data
6-After that select option “reboot system now”.
7-Well done! The hard reset has just been performed.