6s can't get a text message from 6. What's wrong?

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 "Show Subject Bar" in SMS settings. 5. If you send SMS to multiple people and manually enter numbers, please make sure that you press the line feed key instead of spaces to separate each number. 6. If you can send and receive short messages, you can edit the number of the short message center through internal commands after the above problems are eliminated: inquiry method: dial * # 5005 * 7672 # with iPhone; Setting method: dial * 5005 * 7672 *+86 "SMS center number of SIM card" with iPhone; Delete method: dial # # 5005 * 7672 # with iPhone; Note: The set SMS center number is generally+. If not, it is recommended to restore the network settings. The method is as follows: Set general recovery recovery network settings.