Why does Apple's mobile phone display successfully after setting the center address, but there is no address?

After setting the center address on Apple's mobile phone, the display is set successfully, but there is no address. Solution:

1, enter ##5005*7672#, and press Call.

2. After clearing, enter * 5005 * 7672 *+86 130xxxxxxxxxxxxx #, and press 86130 in step 2 to refer to your local SMS center number.

After setting the center address on Apple's mobile phone, the display is set successfully, but there is no address. Solution:

1. Confirm that the signal is normal and close the flight mode.

2. Check whether the SIM card status is normal.

3. Check whether the send key is bright and clickable.

4. If you can't click Send after entering the text, the "Send" key is still gray. Please turn off "Show Subject Bar" in Settings > SMS >.

5. If you send text messages to multiple people and manually enter numbers, please make sure to use line breaks instead of spaces to separate each number.