T-Mobile is in the middle of a significant nationwide service disruption today, July 27, 2026, with hundreds of thousands of customers across the country reporting lost cellular signal, dropped 5G Home Internet connections, and phones stuck displaying "SOS" or "SOS Only" instead of their usual signal bars.

When it started

Trouble began mid-afternoon, with the first wave of reports appearing on Downdetector around 1:00 PM PT / 4:00 PM ET. Reports climbed quickly from there — Downdetector logged more than 64,000 complaints at the peak, and other trackers put the total number of affected users well over 200,000 once secondary reports and social media complaints are factored in.

The outage isn't hitting everyone equally. Multiple users have described uneven impact even within the same household — one phone showing "SOS" while a second T-Mobile device sitting right next to it keeps a full signal. Reports have come in from coast to coast, including California, Arizona, Utah, Washington, Pennsylvania, New Jersey, and Maryland, among other states, pointing to a broad network-level issue rather than a problem isolated to one region or tower.

The disruption has also created ripple effects for other carriers. Some AT&T and Verizon customers reported issues too, though this appears to largely be a side effect of T-Mobile customers being unable to complete calls or texts to those networks, rather than a separate outage. A number of MVNOs (mobile virtual network operators) that run on T-Mobile's infrastructure, along with services like Spotify and Xbox Live that rely on connectivity, also saw disruptions tied back to the same root cause.

While Downdetector reports have started trending downward from their peak, service disruptions remain ongoing in multiple regions as of this writing.

What T-Mobile is saying

T-Mobile has acknowledged the outage and issued the following statement:

"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."

Early on, some customers reaching out through social media were reportedly asked to DM their account details for individual review, suggesting T-Mobile was initially triaging cases one at a time before treating it as the network-wide event it has since proven to be.

What you can do right now

If your phone is stuck in SOS mode or you've lost signal entirely, there are a few things worth trying while T-Mobile works on a fix:

  • Enable Wi-Fi Calling. If you have access to Wi-Fi — at home, work, or a public network — turn on Wi-Fi Calling in your device settings (Settings > Cellular on iPhone, or Settings > Connections > Wi-Fi Calling on Android) so you can still make calls and send texts.
  • Toggle Airplane Mode. Once the network shows signs of stabilizing in your area, switch Airplane Mode on for about 10 seconds and then off again. This forces your phone to search for and reconnect to the nearest cell tower.
  • Restart your device. If your local tower has come back online, a simple restart can help your SIM re-register with the network.
  • Avoid resetting your network settings for now. This is a carrier-side issue, not a problem with your phone's configuration. Resetting network settings won't restore service any faster and just adds an extra step you'll have to redo (re-entering Wi-Fi passwords, Bluetooth pairings, etc.) once T-Mobile resolves things on their end.

Note that SOS mode still allows emergency calls to go through, even when regular calls, texts, and data are unavailable.

What happens next

This isn't the first time T-Mobile's network has gone down nationwide — a similar outage in June 2020 took the carrier's voice and data services offline for several hours before being traced back to an IP traffic issue. T-Mobile has not yet released technical details on the root cause of today's outage. As with past incidents, a fuller explanation typically follows once service is fully restored.

For now, the safest bet is to lean on Wi-Fi Calling where you can, keep an eye on T-Mobile's official channels for updates, and give the fix a little time to reach your area — since restoration to affected regions doesn't happen simultaneously nationwide.

This is a developing story — details may change as T-Mobile continues to investigate and restore service.