On your ITEL A48, go to Settings > System > About Phone . Tap Build Number 7 times to enable Developer Options.
Go back to Settings > System > Developer Options and turn on USB Debugging and OEM Unlocking . How to Open Bootloader Mode on ITEL A48
Release both buttons. You are now in Factory Mode or SPD Upgrade Mode – this is the bootloader-equivalent interface for Spreadtrum (Unisoc) chipsets used in the A48. On your ITEL A48, go to Settings >
Power off your ITEL A48 completely. Wait 10 seconds. On your ITEL A48
Type the following command and press Enter: