Why can Apple 4s send text messages but not reply?

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.

Note: The set SMS center number is generally similar to the mobile phone number after +86. Please re-insert the SIM card when setting the SMS center number. It is suggested to delete the SMS center number first and then set it again.

If not.

It is recommended that you try to restore the network settings as follows: Set general restore restore network settings.