I bought a Viettel SIM and I don't know how to use it (#101* says I have 100k đ).
1) How can I change the language to English? I fould some instructions (call 900, then #4#2#1) - it doesn't work.
2) How can I order a data package? If I send a request to 191 I get this:
"Theo yeu cau cua Bo Thong tin Truyen thong, tu ngay 15/11 Viettel dung chuong trinh khuyen mai nay. Quy khach bam*098# de biet cac chuong trinh CSKH danh rieng cho Quy khach. Tran trong."