How to Check your Prepaid Balance and Usage for T-Mobile US/UK
To check your prepaid balance : enter #999# and send the call.
To Check Check your balance: Enter #BAL# (#225#) and send the call.
Or Call 1-877-778-2106 from any touch-tone phone
To Check your prepaid remaining minutes, enter #999# and send the call.
To Check your minutes: Enter #MIN# (#646#) and send the call.
Check your text messages: Enter #MSG# (#674#) and send the call.
Check your data usage: Enter #WEB# (#932#) and send the call.