warring :before you give handset to repair shop or buy new handset,please try the following procedure to Repair your device. Frist charge your battery more then 75%, backup your important data like phone-book,message,email,image,and setting and in most cases take out sim card and SD card. after doing hard reset not possible to recover your data, so online backup is always important. for all of your data,a backup should be Done. on a external device,hard drive raid system media or SD card.
Samsung Galaxy j7 (SM-J700F) How To Hard Reset
Hard Reset
1) Turn off the phone completely
2) press and hold both Volume UP + and Home ( middle ) + Power on
3) when Android Recovery menu screen appears release all keys.
4) select WIPE DATA/FACTORY RESET and confirm.
5) using the Volume down key and press Power
6) Yes -- Delete All data and press Power.
7) All data will be lost! Before doning a hard reset backup all important data.
After hard reset is done select Reboot system now. Press power to reboot the phone.
On dial screen enter this samsung Galaxy j7 (SM-J70F) Reset code : *2767*3855# All data will be lost!
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