ZTE Velocity Data 4G LTE Mobile Wi-Fi Hotspot MF923 (Black) At&t

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 Micro size SIM Card The sim card does not come included, FYI Firmware Updates will only be available over the Air with an Active AT&T Sim card if you will be using this device with a Network Other than AT&T 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 AND CAN BE RECEIVED BY THIS DEVICE: LTE bands 2/4/5/17/29 and UMTS HSPA 850/1900/2100. As well this device can provide WIFI: Dual-Band WiFi (2.4GHz or 5GHz) This variation of bands give it the ability to roam on LTE in many foreign countries, including all of Europe and much of Asia. HOW LONG CAN I EXPECT THE BATTERY TO LAST ME: Well the battery has 2,800mAh which in a Usage time frame means