T-Mobile ‘actively working’ to fix ongoing outage, iPhone SOS mode

Update #2, 4:15 p.m. PT: In a statement to 9to5Mac, a T-Mobile spokesperson said:

“Our teams are actively working the reports of technical challenges impacting some customers. Any service impacts are in the process of being resolved and are our highest priority. We know how critical it is to stay connected, and every available resource is focused on resolving this as quickly as possible.”

Update #1, 3 p.m. PT: Some T-Mobile users report that service is returning to their iPhones. Others, however, say the outage is ongoing.

T-Mobile is down across the United States, and many iPhone users are seeing “SOS” in their device’s status bar. Here’s everything you need to know about today’s T-Mobile outage.