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.

T-Mobile's cellular Starlink beta program was initially restricted to five Samsung phone models. But the carrier has quietly expanded it to select iPhones running iOS 18.3.

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.

T-Mobile is expanding its Starlink beta program. Now, some iPhone and Samsung Galaxy users can connect to SpaceX's satellites.

The latest update Apple rolled out for the iPhone allows T-Mobile customers — a select few, for now — to be able to send text messages even in locations where they have no coverage. iOS 18.3 adds support for SpaceX and T-Mobile's direct-to-cell satellite service,

For now, the T-Mobile direct-to-cell service via Starlink only provides basic messaging, but when more satellites are added, images and even audio streaming will be possible. Video streaming in the boondocks without carrier towers will only be possible with the next-gen Starlink cellular network constellation, though.

Mobile’s list of eligible devices for beta testing Starlink direct-to-cell connections now includes iPhones. While only a few Samsung Galaxy devices were supported at first, now iPhone owners with the most recent update can reportedly connect,

Apple has been working with Starlink and T-Mobile in secret to get iPhones ready for expanded satellite connectivity, and the feature is now enabled with iOS 18.3 ahead of the full service launch.