Compatibility: Jack Tel LLC makes every effort to ensure that its products and services are compatible with various devices and networks. Currently all T-Mobile accounts and most Verizon accounts work with Jack tel devices.  However, due to the complexity of the constantly evolving technology landscape, we cannot guarantee compatibility with every device on every network. We encourage customers to inquire about a sample IMEI if they are unsure about compatibility. We will hold that particular phone for 72 hours. If you decide to make the purchase, please include the referenced IMEI at checkout. It is important to note that carriers may have different policies regarding device compatibility. While some carriers have a bring-your-own-device program and allow customers to insert their sim card in any network-compatible device, others do not allow phones on their network that were not originally purchased from them. Some carriers may also consider AOSP based devices to be a breach of its end-user agreement. Therefore, it is the customer’s responsibility to confirm compatibility with their carrier before purchase Opinion on Compatibility: Based on our experience, Verizon, T-Mobile, and its subsidiaries such as MetroPCS have been more receptive to customer device freedom, whereas AT&T and its subsidiaries have been less receptive. We personally use T-Mobile service on our devices.