With iOS 18.3, iPhone users with T-Mobile can connect to Starlink satellites. T-Mobile Starlink is in beta and requires signing up. It currently supports text messages and contacting emergency services when you don't have cell coverage.

T-Mobile partnered with SpaceX last year and launched a beta program for Starlink connectivity last December. However, the company originally only offered the option on Samsung phones. Now, this has been expanded to the iPhone as well.

Starlink support appears to be a secret iOS 18.3 feature for iPhones, some of which now support satellite communication services from SpaceX — but only for users invited to join public beta testing of the service on US carrier T-Mobile. This supplements Apple’s existing satellite services supplier, Globalstar.