If you're planning to use a smartphone on the Verizon network, especially one that's second-hand or unlocked, you'll need to check the Verizon IMEI. Whether you are buying a second-hand iPhone or switching carriers, you need to have the device's IMEI (International Mobile Equipment Identity) checked to ensure that the phone is said to be "compatible", is not blacklisted, and can be ac... https://trackimei.net/blog/verizon-imei-check-key-to-device-verification-for-compatibility/