This phone comes with Android 5.0 Lollipop (TW). Supports dual-SIM with 2G and 4G for either SIM card (this is NOT dual 4G). Please check with your carrier for compatibility before purchase.Dual-SIM : 3G WCDMA 850 / 900 / 1900 / 2100 ; 4G FDD-LTE 2100MHz(1) / 1900MHz(2) / 1800MHz(3) / 1700MHz AWS(4) / 850MHz(5) / 900MHz(8) / 700MHz(28) ; 4G may not work in the US, 3G works with AT&T ; LTE compatibility: This is international stock, varies per carrier (ensure to check with your carrier before purchase); DOES NOT work with Sprint, Verizon, U.S. Cellular and all other CDMA carriers.
64GB ROM, 4GB RAM, Supports microSD up to 128GB
Intel Atom Quad Core Z3580 (2.3 GHz), PowerVR G6430, with OpenGL 3.0 support