With iPhone 14 or later, you can send iMessages or SMS messages via satellite when you’re off the grid with no cellular and Wi-Fi coverage.| Apple Support
With iPhone 14 or later (all models), you can connect your iPhone to a satellite to text emergency services, request roadside assistance, message friends and family, and share your location — all while you're off the grid with no cellular and Wi-Fi coverage.| Apple Support
With iPhone 14 or later, you can use Emergency SOS via satellite to text emergency services when you're off the grid with no cellular and Wi-Fi coverage.| Apple Support