Vietnam to officially roll out mobile number portability (MNP) from November 16th 2018 | News
Viettel launches 4G service across Vietnam - Mobile World Live
Mobile-money rush among cellular companies sets off in Vietnam | Tuoi Tre News
Viettel Mobile Vietnam Top-up: International mobile refill
Viettel mobile - VnExpress International
DỊCH VỤ MOBILE SIP TRUNKING Viettel | Hóa đơn điện tử, Hóa đơn điện tử Viettel , einvoice, invoice, e-invoice, hóa đơn, bảo hiểm xả hội, vtax, internet, FTTH, Định vị SmartMotor,
Airtime API for Viettel, Mobifone, Vinaphone and Gmobile in Vietnam
Viettel launches mobile money services | Business | Vietnam+ (VietnamPlus)
Viettel – Mobile Network Service for Everyone
Doctor Anywhere partners with ViettelPay, part of Vietnam's largest mobile network operator Viettel, to become the 1st telco and payment gateway to provide online healthcare services - PR Newswire APAC