Power Off: Turn off your itel A16+ completely.
The Button Combo: Press and hold the Power Button and the Volume Down button at the same time.
The Logo: When you see the "itel" logo appear, release the Power Button but keep holding Volume Down until you see the Android Recovery screen (it might look like a lying-down robot or a list of text).
Navigate: Use the Volume Up/Down buttons to scroll through the menu. Select "Wipe data/factory reset."
Confirm: Press the Power Button to select it. Then scroll to "Yes" or "Factory data reset" and press Power again to confirm.
Reboot: Once it finishes, select "Reboot system now."
Contact me:
Geometry Dash