Restoring the factory through a hard key

1.If the version of the phone is 2.42.6.x.x, the way to restore it to the factory is as follows: 

   Factory Rest: Press the Menu key to enter the menu page, and then press "*" 3 times. The following interface appears. Select 2 to restore the factory.

Open

2.If the version of the phone is 2.0.4.x.x, the way to restore it to the factory is as follows:

   Factory Rest: Press the asterisk button three times and press the X key for 10 seconds and release, then the phone should begin the restart to factory procedure.

Factory Rest: The phone only plugs in the power cord and without the network cable. When the power light is on for about 3 seconds, press the asterisk button three times and press the * key for 10 seconds and release, then the phone should begin the restart to factory procedure.