What happens if I have insufficient funds on T-Mobile Prepaid Pay By The Day rate plan?
If funds are not available, your call will not be placed and you will receive a message notifying you of the status of your account. Any incoming callers will be notified that the T-Mobile Prepaid customer cannot receive calls at this time. If you run out of funds during a call, you will receive a voice message warning that there are 30 seconds remaining to complete the call.