The message was unintentionally encrypted, and no password was set, but a password was needed to open it. What should I do?

Hello, there is no default password for smartphone SMS password. The password you set for the first time is the original password. 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 the data on the mobile phone, including the phone book, SMS and installed third-party programs, and the data on the TF 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. If you have any other questions, you can enter the vivo enterprise platform to ask customer service questions. Thank you for your support of vivo and wish you a happy life!