Apple Inc. has been secretly working with SpaceX and T-Mobile US Inc. to add support for the Starlink network in its latest iPhone software, providing an alternative to the company’s in-house satellite-communication service.

Right now, iPhones use Apple’s own satellite service, but it’s pretty basic—just emergency calls, texting, and location sharing.

According to Bloomberg’s Mark Gurman, the companies have been testing this integration with Starlink, a service from Elon Musk’s SpaceX, on iPhones. With the release of iOS 18.3 on Monday, this support became available, although Apple did not highlight this in the update notes.