For USA Buyers: This Smartphone is compatible/will work with any GSM Networks such as AT& T, T-Mobile. For exact 2G GSM,3G,4G/LTE compatibility, please check with your network provider in advance prior to your purchase. This phone WILL NOT WORK with any CDMA Networks such as VERIZON, SPRINT, US CELLULAR. Hybrid/Dual-SIM (Nano-SIM), Network Compatibility: SIM CARD 1 [ 2G GSM and/or 3G 850(B5) / 900(B8) / 1700|2100(B4) / 1900(B2) / 2100(B1) and/or 3G TD-SCDMA: 2000 / 1900 and/or 4G LTE: 700(B12) / 700(B13) / 700(B17) / 700(B28) / 800(B18) / 800(B19) / 800(B20) / 850(B5) / 850(B26) / 900(B8) /1500(B32) / 1700|2100(B4) / 1700|2100 (B66) / 1800(B3) / 1900(B2) / 1900(B25) / 2100(B1) / 2600(B7) and/or: TD-LTE: 1900(B39) / 2300(B40) / 2500(B41) / 2600(B38) / 3500(B42) ] and SIM CARD 2 [ 2G GSM ]5.8 inches, Dynamic AMOLED capacitive touchscreen,16M colors,1080 x 2280 pixels,19: 9 ratio (~438 ppi density), Corning Gorilla Glass 5128GB Storage,6GB RAM, Up to 512GB microSD Card slot (uses SIM 2 slot)Android 9.0 (Pie), Exynos 9820 Octa (8 nm), Octa-core (2×2.73 GHz Mongoose M4 & 2×2.31 GHz Cortex-A75 4×1.95 GHz Cortex-A55), DualCamera 12MP, for/1.5-2.4,16 MP, for/2.2, LED flash, auto-HDR, panorama,2160p at 60fps,1080p at 240fps,720p at 960fps, HDR, dual-video rec, Front Camera: 10MP, for/1.9,26mm (wide), Dual video call, Auto-HDR,2160p at 30fps,1080p at 30fps.