How to Check T-Mobile Data Usage (and See Which App Used It)
Dial #932# or use the T-Life app to check T-Mobile data usage per line, understand 80% and 100% alerts, and see which app on your phone used it.
4 min readUpdated
The short answer
Dial #932# (#WEB#) from your T-Mobile phone for a quick usage check. For more detail, open the T-Life app, go to Account, pick the line and tap Data used. You can also sign in at T-Mobile.com and go to Usage > Data.
T-Mobile tells you how much each line used. It does not tell you which app used it. Your phone's settings do.
Dial #WEB# (#932#)
- 1From the T-Mobile phone you want to check, dial #932# and press call.
- 2Wait for a text with the data you've used and the details of your data plan.
Check in the T-Life app
- 1Open the T-Life app and sign in.
- 2Tap the Account tab (it used to be called Manage).
- 3Under People, tap the line you want to check.
- 4Tap Data used. You can switch between data, messages and calls, and the overview covers the current bill cycle.
One thing to watch: the recap on the app's Home tab covers the previous calendar month, which may not match your bill cycle. Use the line's usage view for bill-cycle numbers.
Check on T-Mobile.com
Sign in at T-Mobile.com in a browser and select Usage > Data. You will see data use for the account, including mobile hotspot data. Select a line for more detail, or download that line's usage records.
T-Mobile shows usage in Pacific Time, and it typically updates about every two hours. If you just streamed a film, the number may not have caught up yet.
How T-Mobile usage alerts work
T-Mobile sends a free text when you reach 80% and again at 100% of your usage on plans with a limit. The primary account holder also gets a message when a line goes over its limit. If you buy a hotspot data pass, T-Mobile texts you at 80% and 100% of that pass too.
These alerts are about your plan's limits. They do not warn you that one app is eating data faster than usual.
Per line and hotspot, but not per app
T-Mobile breaks usage down by line, and its website shows how much mobile hotspot data you've used. That tells you which phone is using the most, and roughly how much went through the hotspot. It does not list the apps on the phone, or which laptop on the hotspot used the data.
If a line is much higher than you expect, the next step is the phone itself. If the hotspot number is high, check the devices you connected. See Which Device Is Using All My Wi-Fi Data? How to Find Out.
Why T-Mobile's number and your phone's number differ
- Different start dates. T-Mobile counts by bill cycle. iPhone counts from the last reset, and Android from whatever cycle date you set.
- Update delays. T-Mobile's figure typically updates every two hours, and roaming usage can take much longer to appear.
- Different measuring points. Your phone measures on the phone. Google notes that some carriers measure usage differently.
T-Mobile's number is the one that applies to your plan. Your phone's number is the one that shows where the data went.
See which app used your data
On iPhone: open Settings > Cellular and scroll down to the app list. Reset the statistics on your T-Mobile bill date to keep the totals in line. See How to Check Data Usage on iPhone for the full steps.
On Android: open Settings > Network & internet, tap your SIM, then App data usage. On Samsung, it is Settings > Connections > Data usage.
On another carrier? See How to Check Verizon Data Usage (and See Which App Used It) or How to Check AT&T Data Usage (and See Which App Used It).
Summary
- Dial #932# (#WEB#) for a quick text with the data you've used.
- In T-Life: Account > pick the line > Data used. On the web: Usage > Data.
- T-Mobile texts you at 80% and 100% of plans with a limit.
- Usage is shown per line, with hotspot data on the website, but not per app.
- T-Mobile's figure updates about every two hours, so it can lag behind your phone.