DOES THIS DEVICE NEED A SIM CARD: Yes it does Being that this device is GSM unlocked it will work on any GSM Network with a Nano size SIM Card The sim card does not come included, You will need to contact your Network Provider to acquire your complimentary Sim card (Free from most Carriers with activating of an account). WHAT NETWORK FREQUENCIES ARE SUPPORTED BY THIS DEVICE: The Phone supports LTE Bands 2, 4, 5, 12, 30. WCDMA 1,2,5. GSM 850, 900, 1800, 1900. Please contact your network provider and inquire whether they support any of these bands to ensure the device will work on their network. HARDWARE SPECKS: Well the battery has 3000mAh which in a Usage time frame means 17 solid hours of streaming at 4G LTE speeds as well it has a Standby time of up to 720 hours before you need to recharge the battery this device comes with a 6 in the screen which is well over 1 inch larger than the standard cell phones on the market perfect for the seniors or people that are hard of seeing as well as movie lovers and those that like to carry a brick with them wherever they go.