Tips: Win8 system can not be upgraded to the Win10 system directly, otherwise PC will cause language problem that only showing Chinese, the factory will inform the further upgrade time. Main Features: RAM: 4GB ROM: 128GB HDMI/WiFi/Bluetooth Function Supported Ultimate technology brings smooth and precise touch experience. Multifunction makes playing games, listening to music and surfing the Internet possible. Note: This phone will only work with GSM+WCDMA networks: GSM 850/900/1800/1900MHz WCDMA 900/2100MHz FDD-LTE 800/1800/2600MHz Unlocked for Worldwide use. Please ensure local area network is compatible. click here for Network Frequency of your country. Please check with your carrier/provider before purchasing this item. These networks are only for surfing Internet, not for phone call.