On your PC, open a command prompt (CMD) in the folder where you have ADB and Fastboot installed.
Type the following command and press Enter: 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. On your PC, open a command prompt (CMD)
Press the Power button once to select it. Your device will now enter Bootloader/Fastboot Mode. Method 2: Using ADB & Fastboot Commands (For Advanced Users) This method requires USB Debugging to be enabled on your phone. On your PC
Press and hold the Volume Up (+) button and the Power button simultaneously.