Admin da test thu va thanh cong 100%. Nhu cac ban da biet khi chung ta gui tin nhan den 9119 (loi de nghi) thi chi viet duoc 20 ky tu. Nhung gio day minh da co cach gui duoc 160 ky tu (1 trang). Cach lam:khi chung ta soan tin nhan toi 9119 thi khi viet xong sdt thi chung ta an 6 dau cach sau do nhap ky tu ma ban muon viet. VD : 01644644280<6 dau cach>anh.yeu.em.nhieu.lam. (luy y cac ky tu phai cach bang dau cham ko dung dau cach)