1. First click to open the settings interface of iPhone, and then click your Apple account name at the top of the page.
2. Enter the Apple ID page and you can see iCloud, iTunes store and App store. Let's click to enter iCloud first.
3. After entering the iCloud page, we will turn off all application switches, including photos.
4. Then we click into iTunes store and App store, where we close the app and update it.
5. Finally, we click the slide settings page to find the information settings.
6. After entering the information setting page, we can close iMessage.
Precautions:
If you want to synchronize two Apple phones again, just turn on all the switches according to the above steps.