"Postpaid Wireless" refers to contract-based cell phones with plan activation. The types of phones sold through this program include FREE and greatly-discounted devices through Verizon Wireless, Sprint, and T-Mobile. It's called "Postpaid" because customers pay their Verizon, Sprint, or T-Mobile bill for the previous month's usage. Postpaid phones are priced very low, or given for FREE, because the customer is required to stay with the carrier for 2 years. TMI currently works with two authorized online dealers to offer you the Postpaid Wireless program. Note that TMI does not directly handle fulfillment or customer service for any of the Postpaid cell phone products.