When you try to send a text message but you’re outside of cellular and Wi-Fi coverage, you get an alert to connect to your nearest satellite. You can then exchange texts, Tapbacks, and emoji over iMessage and SMS.
Go to the Messages app on your iPhone.
If you see an alert that you’re outside of cellular and Wi-Fi coverage, tap Use Messages via Satellite.
Follow the instructions to connect to a satellite, while remaining aware of your surroundings. You don’t need to raise your phone—just hold it as you normally would, and make sure that you’re outside with a clear view of the sky and the horizon. If you’re under heavy foliage or surrounded by other obstructions, you might not be able to connect to a satellite.
Other satellite-enabled services also become available, including Emergency SOS via satellite, Roadside Assistance, and Find My.
Enter your message, then tap . (The Send button is green instead of blue when sending with SMS.)
It may take a few minutes to send your message via satellite.
When you connect, a green dot and appear at the top of your screen. If your connection weakens, the green dot turns orange, and and tell you where to find the signal.
If you have cellular or Wi-Fi coverage and use iMessage via satellite to communicate with someone who doesn’t have either, an alert tells you if your contact is accepting messages via satellite. Tap , then tap Send via Satellite (below the message bubble) to send your message.