tham khảo ở đây bạn nhé: https://www.nhattao.com/threads/ban-nokia-lumia-720-con-bao-hanh-chinh-hang.3233119/
Bên mình có lumia 720 nhé, link https://www.nhattao.com/threads/chuyen-lumia-620-720-820-900-920-925-929-928-1020-1320-1520-bh-3-thang.2867183/