Why did Apple change its mobile phone? The old one can still receive messages.

Because the new Apple phone is used, and the two apples use the same "Apple ID" account, the information of the two phones will be synchronized. Just turn off the synchronization of Messages in the settings.

Materials/tools: iPhone8.

Specific operation can refer to the following steps:

First, open "Settings" on the desktop of the old Apple phone.

2. Click the "Apple ID" avatar column at the top of the "Settings" page to enter.

Third, select "iCloud" in "Apple ID" and click to enter the next step.

4. Finally, find the "information" column on the "iCloud" page and click the button on the right to close the function to complete the operation, so that the "information" of the two mobile phones will not be synchronized.