BBK vivo v 1 SMS is encrypted. How to delete a forgotten password?

Hello! There is no default password for smartphone SMS password. You need to set a password for the first encryption. If you set your password and forget it, you can use the vivo assistant to back up the relevant data on the computer side, and then go to Settings->; General->; Restore factory settings-> Clear all data to clear the password. This operation will lose all data on the mobile phone, including contacts, information and third-party programs installed by yourself, and the data on the SD card will not be lost. If there is no data to be backed up in the mobile phone, you can directly clear all the data in the mobile phone to clear the password.