Viettel-Mobile
Vietnam
★★★ Verified
Customer:
198
Viettel is Vietnam's largest mobile operator, owned by the Vietnamese military, founded 1989. Around 50% market share with 54 million subscribers, leading 4G/5G coverage including remote mountains and islands. Operates separate main and bonus accounts; USSD is the primary tool for balance enquiry, recharge, and data plan subscription.
USSD codes by category
6 codesBalance Enquiry 3 codes ▾
*101#
Check main account balance (free)
*102#
Check subsidiary/promotional balance
*111#
Check prepaid card account
My Number 2 codes ▾
*777#
Show own mobile number
*888#
Show own mobile number (alt)
Recharge & Transfer 1 codes ▾
*100*<voucher>#
Top-up via voucher PIN