Cach them 1 nam thoi han cho AIS SIM2Fly SIM roaming

Minh hoa cach nap tien nho co the keo dai thoi han cua AIS SIM2Fly SIM roaming tung buoc co the them thang toi mot nam Hien thi kiem tra USSD cac quy trinh nap tung buoc va ky thuat ung dung de duy tri SIM tra truoc cho cac chuyen di tuong lai huu ich cho nguoi dung muon giu so giua cac chuyen di