Note: If your phone is turned off or in airplane mode you will be unable to send or receive SMS, MMS or third-party notifications with Apple Watch Series 4 (GPS + Cellular). To send and receive iMessages on your Apple Watch Series 4 (GPS + Cellular), you must be signed into the same Apple ID on your iPhone and Apple Watch.
- Step 1 of 7:
From the Home screen, tap Settings.
- Step 2 of 7:
Scroll to Messages.
- Step 3 of 7:
- Step 4 of 7:
Tap or slide the iMessage slider to the on position.
- Step 5 of 7:
Tap Send & Receive.
- Step 6 of 7:
Select the address that corresponds with your Apple ID under "YOU CAN RECEIVE IMESSAGES TO AND REPLY FROM".
Note: This address must be checked and match with your Apple Watch to send and receive iMessages on your Apple Watch Series 4 (GPS + Cellular).
- Step 7 of 7:
You've completed the steps!