can tien len ban i900 16g the nho 2g chuc nang may bac vao day xem nha http://www.vienthonga.com/MobilePhon...ID=6&Mode=I900 OMNIA 16G moi thay vo chua sua chua gi het gia cho em lo ra di la 2t7 o truong dai hoc cong ngiep sdt 0978509931