LG K8 Phoenix 2 K371 AT&T GSM Unlocked 4G LTE 16GB Smartphone - Black Unlocked device compatible with GSM carriers. Not Compatible with CDMA Carriers such as Verizon, Sprint, and Boost. Please contact your carrier and make sure the frequencies are compatible before purchasing. (Ask seller if you have any questions) Network Bands: 2G - GSM 850 / 900 / 1800 / 1900 ; 3G - HSDPA 850 / 900 / 2100 ; 4G - LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800). (You may need to update APN Settings from your network provider on the phone) Phone requires a Nano size SIM Card (smallest type) and you will need to contact your Network Provider to acquire your complimentary Sim card if you do not already have one. 5.0'' Display, Android 6.0, Quad-Core 1.3 Ghz, 1.5 GB Ram, with 8 MP Flash Camera