How to set the SMS center number of iphone?

The steps to set the SMS center number for Apple mobile phone are as follows (take Apple 7 as an example):

1. Open the phone and click the phone icon.

2. Then click *5005*7672* in the dialing area, press it and then click the dialing sign below.

3. Then wait. You can see the successfully set words on the page, and then click Close.

4. Then go back to inquire, click *#5005*7672#, then inquire and click Dial.

5. Then it will jump out directly and turn on the switch of iMessage information on the mobile phone, so the setting is successful.