iMessage is Apple’s messaging service for sending messages between supported Apple devices over Wi-Fi or cellular data. It is configured through the Messages settings on your iPhone.
Turn On iMessage
- Open Settings.
- Tap Apps.
- Tap Messages.
- Turn on iMessage.
- Wait for activation.
Check Send & Receive
- Open Settings > Apps > Messages.
- Tap Send & Receive.
- Review the phone numbers and email addresses available for iMessage.
- Select the addresses you want people to use to reach you.
- Choose the address or number you want new conversations to start from.
If iMessage Is Waiting for Activation
Make sure the iPhone has working internet access, the date and time are correct, and your phone number and carrier service are functioning. Activation can involve an SMS message, and carrier charges may apply.
iMessage vs. SMS and RCS
Turning on iMessage does not mean every conversation will use iMessage. Messages to non-Apple devices can use other supported messaging technologies depending on the recipient, carrier, region, and your settings.
If You Are Switching Away From iPhone
If you permanently move your phone number to a non-Apple phone, make sure iMessage is properly deregistered so messages addressed to your number are not unnecessarily routed through Apple’s service.
Check the Conversation Type
If iMessage is enabled but a particular conversation does not use Apple’s service, verify that the recipient can receive iMessage at the address or number you selected. The appearance and available features of a conversation can differ depending on the messaging service being used.
Activation Can Take Time
If iMessage does not activate immediately, avoid repeatedly toggling settings or signing out of the account. Apple advises that phone-number verification can take time; use its activation troubleshooting if the status remains unresolved.