How to back up all the SMS messages from the old Apple phone to the new Apple phone?

Open iTunes, connect the old mobile phone to the computer, and click File > Device > Backup to ensure the success of the backup;

After successful backup, unplug the old mobile phone, connect the new mobile phone to the computer, and click File >; Devices > restore from backup;

The contents of the old mobile phone will be restored to the new mobile phone synchronously, but the contents of the new mobile phone will be overwritten. If there is needed data on the new mobile phone, it should be backed up first to avoid data loss;

2. Backup through iCloud

Connect the mobile phone to WiFi, open the mobile phone settings > iCloud & gt backup, and now click Backup to wait for the backup to be completed (many people don't know that if you can meet the four conditions of enabling iCloud cloud backup function, WiFi environment, connecting the mobile phone to power supply and locking the screen at the same time, the mobile phone will automatically back up at ordinary times, so you can check the last backup time);

Click new phone settings > Restore > Erase all contents and settings > Erase iPhone (this step is not needed if it is an unused new phone);

When the new phone is turned on, select "Enable Location Services". After connecting WiFi, on the phone settings page, select Restore from iCloud cloud backup, log in to your Apple ID, and restore.

The new mobile phone needs to restore and erase all the data on the iPhone, and can back up the data in advance if necessary.