4.0" Touch Screen Cell Phone GSM T-Mobile AT&T Unlocked Multifunction bar phone Operation Frequency:GSM 850/900/1800/1900MHZ, automatically frequency switching(This Cell Phone only works with GSM 2G networks, NOT 3G Networks) Note: This phone will only work with GSM network 850/900/1800/1900MHz, please check if your local? DualSIMdual standby:supports 2 SIM 2 standby simultaneously Multi-Language: English, Arabic, Persian, French, Turkish, Portuguese, Spanish, Russian, polish, Thai, Vietnamese, Malaysian, Indonesian, Italian, Hungarian, Burmese Systerm :MTK (its not a smart phone)