T-Mobile is preparing to open a mobile phone service using Starlink satellite.

SpaceX is preparing to begin testing its new Direct-to-Cell (DTC) Starlink satellite service. The DTC service aims to provide mobile phone connections to remote areas not covered by regulated radio networks.

The DTC beta test will start on January 27, 2025, and continue until July 26, 2025. This new service is based on SpaceX's existing Starlink network, which consists of approximately 7,000 low Earth orbit satellites providing internet access to over 46 million users in more than 118 countries.

The satellites include devices that function like cell towers but are located in space, known as eNodeB modems. These modems send data to ground networks and partner carriers and are designed for compatibility with existing mobile phones, so no new hardware is required.

T-Mobile's beta test will focus on text messaging. Data and voice functionality will be added later. The test phases include satellite launch, orbital deployment, altitude adjustment, and operational implementation. For DTC service to transition from testing to full use, it must achieve target data speeds and reliability. T-Mobile users who have participated in the beta test are already receiving joining links, so they can prepare to try this feature if they wish to check their emails.

All DTC-equipped satellites also perform regular Starlink tasks beyond direct mobile phone services, which could potentially affect the Starlink satellite internet service. SpaceX is seeking permission to begin testing during this beta phase and appears to have received it. The main purpose of this test is to confirm how well the complete DTC satellite system functions and to identify necessary improvements before a wide-scale launch.

This technology can be effective for personal phone calls and emergencies, particularly useful for people in remote areas. It may also allow navigation through map services when regular mobile phone service is unavailable.