Lenovo A850+ 4GB White, Daul Sim, MTK6592 Octa Core 1.7GHz, 5.5", Unlocked International model, No Warranty Brand & Model: Lenovo A850+ Chinese Model. Operating System: Android 4.2, CPU: MTK6592 8 core 1.7GHz; GPU: Mali-450MP, RAM: 1GB + ROM 4GB. 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. Please check if your GSM cellular carrier supports the bands for this model before purchasing: (3G): WCDMA 900/2100MHz; Band (2G): 2GGSM 900/1800/1900MHz. This device may not include a US warranty as some manufacturers do not honor warranties for international items. Please contact the seller for specific warranty information. The box contains: Your new device, USB cable, Charger, Documentation.