Do BuyBackWorld Certified Pre-Owned devices come with cell phone contracts and/or SIM Cards? We simply provide Certified Pre-Owned devices at great discounts without the hassles involved with signing a contract. However, you will need to contact your respective network carrier to use your device on their network. Cs4 Design Standard Keygen on this page. Additionally, please make sure you purchase the correct carrier device for your service. For example, a Sprint device will not work on the T-Mobile network and vice versa. If your network requires the use of a SIM Card, you will need to source and/or purchase one from your carrier directly. We do not sell or ship devices with SIM Cards included.