Dual Nano-SIM (4G + 4G) ; 4G LTE & 3G work with AT&T and T-Mobile ; DOES NOT work with Sprint, Verizon, U.S. Cellular and all other CDMA carriers ; LTE compatibility: This is international stock, varies per carrier (ensure to check with your carrier before purchase) Hisilicon Kirin 970 Octa-core (4x2.36 GHz Cortex-A73 & 4x1.8 GHz Cortex-A53) CPU ; 128GB ROM, 6GB RAM ; 4000 mAh battery. Main Camera: Triple: 40 MP (RGB, f/1.8 aperture) + 20 MP (Monochrome, f/1.6 aperture) + 8 MP (Telephoto, f/2.4 aperture), supports autofocus (laser focus, deep focus, phase focus, contrast focus); Front Camera: 24 MP, f/2.0 aperture, supports fixed focal length.

Screen: Super AMOLED capacitive touchscreen, 16M colors, Size: 5.8 inches, Resolution: 1440 x 2960 pixels, Protection: Corning Gorilla Glass 5. OS: Android 7.0 (Nougat), upgradable to Android 8.0 (Oreo), Chipset: Exynos 8895 Octa. Memory: 64 GB, 4 GB RAM. Camera: 12MP, Front: 8 MP. Sensors: Iris scanner, fingerprint (rear-mounted), accelerometer, gyro, proximity, compass, barometer, heart rate, SpO2. Unlocked cell phones are compatible with GSM carrier such as AT&T and T-Mobile, but are not compatible with CDMA carriers such as Verizon and Sprint. Please check if your GSM cellular carrier supports the bands for this model before purchasing, LTE may not be available in all regions: 2G bands: GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2, 3G bands: HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100, LTE bands: 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 32(1500), 66(1700/2100), 38(2600), 39(1900), 40(2300), 41(2500).