Hey - The Operating System or firmware used by the AG Thetha is the king that requires that either special equipment (normally found at AG Mobile's service workshop be used to read a lost or forgotten password or reload the firmware afresh to clear the existing lost or forgotten password together with all user data for privacy reasons. With that said, you will likely avail the best help with this by contacting AG Mobile's Customer Service at 0861 24 3333 - they will then book your AG Thetha for a firmware reflash.