Oh no, fenghuicheng! I don't like the sound of this at all. We absolutely want to make sure your billing is accurate.
In this Community, we're not able to take a peek at your bill to figure out what we're missing - I know that typically four lines of T-Mobile ONE with AutoPay is $160 a month, so if your bills are supposed to be lower I'm guessing that's due to a promotion your account should be enrolled in? If the credits aren't showing up to reduce your bill to the correct amount, we definitely want you to Contact Us so that we can verify your account details and figure out what's missing here. If you'd like to try an online format, you're welcome to reach out to our T-Force team via Twitter (@tmobilehelp) or Facebook - our teams through those channels do have methods to securely verify your account details and hopefully get to the bottom of this so that you don't have to make these calls!
I have the same issues too.
The customer services agents promised me every time that I will get a correct bill next time, but I have to call them every month to fix it. And I hated to call.
I am in T mobile one too, with 4 lines, it supposed to be $141 total, but I received 150 every month.
Maybe, it is time to switch back to ATT, when I need a new phone.
Hey, l573866660. I'm sorry to read that you're in a similar situation. I agree that monthly maintenance calls to get your bill total corrected is more effort than any customer should need to exert. Can you try reaching out to our T-Force team as recommended to the OP above so that we can take a look at your account and get to the bottom of this once and for all?