T-Mobile is experiencing a widespread outage across the United States, with many iPhone users reporting their devices are stuck in 'SOS' mode. The outage reportedly began around 4 p.m. ET / 1 p.m. PT, according to data from Downdetector. Thousands of T-Mobile subscribers have taken to platforms like Reddit to voice their inability to make calls, send texts, or use cellular data.

Users experiencing the outage will see an 'SOS' icon in their iPhone's status bar, indicating a complete loss of network connectivity. While regular service is unavailable, emergency calls can still be made. As of the latest updates, T-Mobile has not issued an official statement regarding the cause of the outage or an estimated time for resolution.

It appears to be an isolated issue affecting T-Mobile specifically, as other major carriers like Verizon and AT&T are not reporting similar problems. Some users have noted that service began returning around 3 p.m. PT, though the outage remains ongoing for many. The extent of the disruption and the number of affected customers are still being assessed.