Device guides for
If you can't send and receive SMS, there may be several causes of the problem.
To send an SMS, it needs to be written and sent correctly.
Solution: Read SMS
If you're having problems sending SMS to a specific number, the error might be at the receiving end.
Solution: Try sending an SMS to another number.
If your Apple Watch can't send and receive SMS, it may be caused by an unknown connection error.
Solution: Restart your Apple Watch
When flight mode is turned on, all wireless Apple Watch connections are turned off, including the mobile network connection.
Solution: Turn flight mode on or off