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.

In an unexpected collaboration, Apple has partnered with Elon Musk’s SpaceX and T-Mobile US to integrate support for the Starlink satellite network into its latest iPhone operating system. This development introduces a new alternative to Apple’s existing satellite communication service,

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.