Viettel moves 100 million subscribers to home-grown cloud-native charging in three months - with zero downtime
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Summary
HANOI, Vietnam, Oct. 27, 2026 /PRNewswire/ -- Viettel High Technology Industries Corporation (Viettel High Tech), part of Viettel Group, has migrated more than 100 million subscribers and some 5,000 tariff plans at Viettel, Vietnam's largest mobile operator, to vOCS 4.0, its in-house...
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