Why can't the background program of BBK vivos3 be closed? Once closed, there's another one.

Hello, the program that can't be closed, the landlord needs to see what program it is, and some programs need to run in the background. In addition, if the program can't be downloaded, the landlord can download it through the computer and then copy it to the mobile phone or memory card for installation. In addition, please check whether the memory card is damaged.

If it still doesn't work, try "Settings-> General->; Restore factory settings-> Clear all data "Clear abnormal data. Note: This item will lose all the data stored by the user on the mobile phone, including phone book, SMS, third-party application software and related account information, and the data stored on the T card will not be lost. Use with caution.