DOES THIS DEVICE NEED A SIM CARD: Yes since the device is unlocked any GSM Network Nano size SIM card will work (SIM card Not included), you will need to contact your Network Provider to acquire your complimentary Sim card (Free from most Carriers with activation)

WHAT NETWORK BANDS ARE SUPPORTED: Network: GSM, LTE (Multi-Band/Multi-Mode) Frequencies: GSM 850/900/1800/1900 MHz; UMTS: B1, B2, B4, B5; LTE Bands: 2/4/5/12/46/66/71 LTE Roaming: 1/3/7/13/20/38/39/40/41. Please contact your network Provider and Inquire as to there support of these bands in your area to ensure the device will work Properly

HOW LONG CAN THIS PHONE LAST ME ON A FULL CHARGE: Included in this phone is a NON-Removable 3,000 mAh battery that lasts according to the manufacturer for 15 hours of continuous streaming as well as 375 hours in Standby mode (Wireless charging with compatible dock).

WHAT DOES UNLOCKED REALLY MEAN: Unlocked devices are compatible with GSM carriers like AT&T and T-Mobile as well as select NVMO Networks it's best to contact intended Network prior to purchase to confirm compatibility on the bands supported by this device