HTC Desire 820U 5.5 inch Android 4.4 64bit Octa Core MSM8939 13.0 MP Dual Sim Multi-language Unlocked 4G LTE Smartphone Color (White) International Version No Warranty Dual Sim Card Nano Sim Card 4G LTE FDD 900/1800/2100/2600MHz; TDD 1900/2300/2600MHz;3G:WCDMA/HSPA/UMTS 850/900/1900/2100MHz;2G: GSM 850/900/1800/1900MHz Memory Card slot microSD, up to 128 GB Internal 16 GB, 2GB RAM FEATURES OS Android OS, v4.4 QualcommSnapdragonTM615, 64bit Octa Core(MSM8939) ,Messaging SMS, MMS, Email, Push Email Browser HTML5 Double Camera, Front Camera 8.0MP, Back Camera 13.0MP, Support 1080p video Google Play, Bluetooth 4.0 Unlocked cell phones are compatible with GSM carriers such as AT&T and T-Mobile, but are not compatible with CDMA carriers such as Verizon and Sprint. This cell phone may not include a US warranty as some manufacturers do not honor warranties for international version phones. Please contact the seller for specific warranty information.