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.
Go back to Settings > System > Developer Options and turn on USB Debugging and OEM Unlocking . How to Open Bootloader Mode on ITEL A48
On your ITEL A48, go to Settings > System > About Phone . Tap Build Number 7 times to enable Developer Options. Release both buttons
Power off your ITEL A48 completely. Wait 10 seconds. On your ITEL A48, go to Settings >
Use the Volume Down button to navigate to the option labeled "Bootloader" or "Fastboot" (if available).
The Bootloader is a low-level piece of code that runs before the operating system (Android) on your ITEL A48. Accessing Bootloader Mode is essential for advanced operations like installing custom ROMs, gaining root access, or unbricking your device.