How to Samsung Galaxy A7 Hard Reset Remove Pattern Lock
First backup your all impotent data remove sim and memory card. then hard reset/ factory reset your smartphone.1. Press and hold power key to turn off your smartphone.
2. Pressing and hold together Volume Up + Home + Power key To turn on your cell phone until show Samsung logo on the screen.
3. Than Chose This Option "wipe data/factory reset" use volume down key to scroll and power key to confirm.
4. Now Select This "Yes -- Delete All User Data" Press Power Key To Confirm.
5. the last step selects this "reboot system now" Press power key to confirm it wait few second devices will be auto restart and the problem is solved.
if you have any question about hard reset Samsung galaxy a7 please ask me on the comment.