Samsung SM-T231 Tablet (7 inch, 8GB, Wi-Fi + 3G) Unlocked International - White 2G: GSM 850 / 900 / 1800 / 1900, 3G: HSDPA 850 / 900 / 1900 / 2100 3.15 Megapixel Camera (2048 x 1536 pixels) + Front-Facing 1.3 Megapixel Camera. Android v4.4.2 (KitKat), Quad-Core 1.2 GHz Processor. Internal Memory: 8GB, 1.5GB RAM + microSD Slot Expandable up to 32GB This tablet works with GSM carriers such as AT&T and T-Mobile that use Simcard but please contact your service provider to check fully compatibility of the tablet with them. Please note that this tablet are not compatible with CDMA carriers such as Verizon and Sprint. This tablet may not include a US warranty as some manufacturers do not honor warranties for international version. You might need convertor to for the AC adapter.