The device is compatible with all GSM and CDMA carriers. Fully tested and fully functional! Display Message: The device has a message pop up as the part has been replaced but does not hinder the functionality of the device. When you receive the phone, insert a SIM card from a compatible carrier. Then, turn it on, connect to Wi-Fi, and follow the on screen prompts to activate service. Inspected and guaranteed to have minimal cosmetic damage, which is not noticeable when the device is held at arm's length. Successfully passed a full diagnostic test which ensures like-new functionality and removal of any prior-user personal information. (non-data). The device does not come with headphones or a SIM card. It does include a charger and charging cable.