Originally Posted by
STS-134
No. Prepaid = pay prior to use, and if you run out of your allotment (i.e. use more data than you've paid for), then you either get throttled or cut off, until you have added more data to the account. Postpaid = pay after use, generally requires a credit check, and if you go over your allotment, you get a bigger bill after the current cycle ends. The presence of a monthly fee isn't relevant to whether an account is prepaid or postpaid.
By this definition it sounds like most plans (including mine) are prepaid, and the main reason why people get cut off is lack of balance