If you do not make a payment within 30 days, your phone will be disconnected.

How long will Tmobile let you go without paying your bill?

Your account can be less than 30 days past the due date to initiate a payment arrangement but if it's 31+ days past due, you may be required to pay a portion of your past due balance.

What happens if I don't pay my T mobile bill?

If you don't pay your mobile phone contract, your account will go into arrears. Your mobile provider could cut your phone off so you're unable to make or receive calls. If you don't take steps to deal with the debt, your account will default and the contract will be cancelled.