How to prevent the phone number from being lost?

You can back up the phone number, as long as the user can surf the Internet, you can restore the address book at any time, and you can use third-party tools to back up:

1 The mobile phone has WeChat, log in to WeChat, select the "I" tab, go to my homepage, select Settings, go to the Settings homepage, select General, and select functions;

On the function page, you can see that there are many plug-in functions, including friends circle, voice input and other important functions. Select "Address Book Security Assistant" to enter the address book security assistant setting page; Select "Enter Security Assistant" to enter the communication backup page;

On the communication backup page, you can back up and restore the address book. Select Backup to pop up the QQ password input box. After entering the password, a dialog box will pop up to fill in the password of the address book. You can complete the backup of the address book by filling in the corresponding password at one time.