What should I do if I can't send a text message on iphone8plus?

1. Check whether there is a signal on the mobile phone and whether the flight mode is turned on, and then check whether the SIM card is plugged in. Suggest plugging it back in.

2. Go to Settings and check whether iMessage is turned on in SMS.

3. Check whether to turn on the wireless network or move data.

4. The SMS input box has the words iMessage, and you can send information through iMessage. At this time, if the other party is an Apple mobile phone, you can accept short messages.

5. If you still can't send SMS, go to "Settings" in turn and debug the phone by restoring "Restore Network Settings".