There are signs that can point you toward a solution. This article explains:

Different ways to check for large-scale outages impacting everyone.Troubleshooting tips to help fix things that might be wrong on your end.

How to Tell if T-Mobile Is Down

If you think T-Mobile might be down for everyone, try these steps:

What to Do When You Can’t Get Signal or Service

Sometimes T-Mobile can be down in a small area due to a specific cell tower problem; other outages can be the result of problems in parts of T-Mobile’s fiber optics network. If no one else is reporting issues, the problem is probably on your end. If a ’no service’ error appears or you’re not seeing signal bars, you don’t have an active connection to the T-Mobile network. That can mean you might be able to make phone calls but not text (or vice-versa) or perhaps your internet or data connections won’t work but calls and texting will. Try these quick tips to troubleshoot the issue if you think the problem is on your end. On Android phones, swipe down to renewal the setting menu. If Airplane mode is not active, the icon will be greyed out. If it’s not, tap it to turn it off. T-Mobile’s roaming policy does have limits; if you’ve reached your monthly allotment, that could create problems. If you think that’s the case, Wi-Fi Calling will get you back up and running. To check yours on Android phones, go to Settings > Connections > Mobile networks to view the Network mode setting. If you need to change the setting, tap Network mode, and make your selection.