Talk:Vietnam/@comment-183.182.118.42-20190228165914/@comment-27996622-20190313044731

If you are worried about losing your number on Viettel, you can pay 50,000 VND to preserve your number for up to one year. Send VTVANG to 109 and it will deduct 50,000 from your balance and you're safe for 12 months.

References:

http://vietteltphochiminh.com/goi-vtvang-viettel.html

https://dangky3gviettel.vn/dang-ky-goi-cuoc-vt-vang-viettel-giu-so-1-nam.html