This phone is unlocked and compatible with any carrier of choice on GSM and CDMA networks (e.g. AT&T, T-Mobile, Sprint, Verizon, US Cellular, Cricket, Metro, Tracfone, Mint Mobile, etc.). Please check with your carrier to verify compatibility. 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. The device does not come with headphones or a SIM card. It does include a charger and charging cable that may be generic. Tested for battery health and guaranteed to have a minimum battery capacity of 80%. The Samsung Galaxy S20 Ultra is a high-end phone featuring a large 6.9" 120Hz QHD+ AMOLED display, powerful Snapdragon 865/Exynos 990 chip, up to 16GB RAM, 5000mAh battery with 45W fast charging, 5G support, and a versatile quad-camera system headlined by a 108MP main sensor and 100x Space Zoom, plus IP68 water resistance.