This is the most common way to enter the bootloader without using a computer.
This is the safest and most common method for the ITEL A48. How to Open Bootloader Mode on ITEL A48
(if OEM Unlocking was available): fastboot oem unlock or fastboot flashing unlock Warning: This wipes your data completely. This is the most common way to enter
Your ITEL A48 will immediately reboot into Bootloader Mode. How to Open Bootloader Mode on ITEL A48
Press the Power button to select it. Your device will now reboot into Bootloader/Fastboot mode. Method 2: Using ADB (For Advanced Users)