Since the initial announcement, SpaceX has formed partnerships with telecommunications companies worldwide, including Rogers Communications in Canada and Optus in Australia.
Interestingly, T-Mobile’s press release from August 2022 mentioned a beta program in select areas slated for the end of 2023, which was expected to include SMS, MMS, and participating messaging apps. However, Starlink’s website does not mention a beta program, leaving room for speculation that the idea may have been postponed or wasn’t ready for implementation.