Apple 6s SMS center number

Will this happen when everyone's Apple 6 or 6S sends a message? It always displays an exclamation point. Sending failed. . But the other party can receive it.

IPhone can't send text messages. The solution is as follows:

1, whether the cell phone signal is normal.

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 Settings SMS.

5. If it is a group SMS and the numbers are entered manually, please make sure to separate each number with a line break instead of a space.

6. After the above problems are eliminated, you can first check whether the SMS center number of the mobile phone is correct. If it is not correct, you can delete it first and then reset it. After setting, you can also check whether the SMS center number is correct again.

The specific operation mode is as follows:

1. To check the set SMS center number, please dial *#5005*7672# with iPhone.

2. Delete SMS center number: dial ##5005*7672# with iPhone.

3. Set SMS center number: dial *5005*7672*+86 SMS center number # with iPhone.