может еще так получится
10.7.6 Factory Reset
The phone is in default standby mode.
Press [Menu] to find [Advanced Settings], and press [OK].
Press [Advanced Settings] to enter the password (default password is 123) to enter the interface.
Press the [Restore factory Settings] button to select the file to be cleared.
Press [OK] to clear after completion. When you select clear configuration file and clear all, the phone will
restart automatically after clearing.
https://www.fanvil.com/Uploads/Temp/download/20191227/5e0564ae86e0d.pdf