A:AnswerThis phone will work with any of T-Mobiles service offerings. So Prepaid and Postpaid. You should be able to put your current SIM card in this phone and continue with the current Prepaid plan you have. I'm using this phone with a Postpaid family plan. The guy you mention paying $50 a month for his service likely signed up for the $50 Prepaid Unlimited plan which can be set up for recurring payments.