How does an Apple mobile phone transmit short messages to another Apple mobile phone?

The method of transmitting (backing up) SMS from Apple phone to another phone is as follows:

I. Tools/raw materials:

iPhone 1 1、iOS 14.4。

Second, the specific steps:

1. Open Settings on the iPhone home page.

2. Click the "Apple ID" option in the settings list.

3. Then click the iCloud option.

4. Find the information setting item.

5. Click the button next to start synchronization, then log in to the same Apple id on the new iPhone, and then start information synchronization. This way, the information can be transmitted to the novice phone.