SHP-DR708 - How to perform a factory reset

1. Unlock and open the door
2. Take the battery cover off
3. Press and hold the [REG] button for 5 seconds : Ding Dong -> Ding Dong
4. Enter the factory reset code 1470852369 + *
   
   • Success : Ding Dong Deng
   • Fail : Dingdongdingdong