4g lte Compatible At&t Cricket H2O Metro PCS T-mobile

Will a GSM phone work for me: GSM unlocked phones will work on Supported Networks with a NANO SIM Cards (Sim NOT included in purchase) you will need to contact your Service Provider for set up and to get a Sim card
Will this work for me: (GSM): 850, 900, 1800, 1900, 2100, 4G LTE: 1, 2, 4, 5, 7, 12, (MFBI) contact Service provider to verify they support these GSM frequencies in the area you intend on using the device
How long will it last me: The battery capacity is 1350 mAh (a Removable TLi013C1) which can last 8 solid hours of streaming at 4G LTE speeds as well a Standby time of up to 16 days (according to the manufacturer)