Apple can't send text messages when changing cards. It is said that the number of the information center is set incorrectly. How to set it?

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 displayed in bright color and clickable.

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

6. If you can receive or send short messages, after eliminating the above problems, you can edit the number of the short message center through internal commands:

Inquiry method: dial *#5005*7672# with iPhone.

Setting method: dial * 5005 * 7672 *+86 "SIM card home SMS center number" with iPhone #

Delete method: dial ##5005*7672# with iPhone.

Reasons for not sending SMS: network settings, sim card being cut, wrong number of information center.

Method 1: Turn on the settings of the mobile phone and turn on the switch for sending and receiving SMS again;

Method 2: Enter the restore point to restore the network settings;

Method 3: Enter the network and start data roaming;

Method 4: Turn on the mobile phone to dial, and enter * 5005 * 7672 *+8613800ABC 500 # in the dialing interface, where ABC is the local area code (for example, Shenzhen is 755), then press the dial key, and+is the long press of the 0 key;