Many iphones share the same account and accidentally synchronize the address book. Someone else's mobile phone has the number on my mobile phone. How do I delete it?

1. First of all, two people share an ID account, which leads to the confusion of the address book and there is no way to recover it;

2. In view of this situation, it is best not to share an ID account, otherwise important data files cannot be backed up independently, and once lost, they cannot be retrieved;

3. Also, even if you share a file, don't turn on all iCloud synchronization options, otherwise the data information will be synchronized with each other, resulting in confusion of mobile phone information;

4. Click Settings -iCloud, and then turn off all options and functions in iCloud that don't need to be synchronized with each other;

5. In addition, the function of automatic downloading of mutual aid software should be turned off. Click Settings -iTunes Store and AppStore, in which the function of automatically downloading software is also turned off.

6. Furthermore, enter Settings-Messages -iMessage, and it is best to turn off the information synchronization function, so that the messages will not be synchronized with each other.