Viettel Tammi. Start with what you need.

Independent, source-linked guides. Find the right instructions, then use the official app.

One task. One guide.

Checked 2026-11-04

Compare 5GTammi6H, 5GTammi10, 5GTammi25 and 5GTammi60, with general data and social allowances shown separately.

Check Cloud storage access in Tammi, try a small backup and distinguish storage space from mobile data.

Viettel++ point redemption moved from *098# to Tammi. Review your balance, reward terms, expiry and history before redeeming.

Open the official Tammi Web and Tammi OA sites, distinguish personal access from the organisation portal and check shared-device settings.

Distinguish a missing plan from an unconfirmed registration or eligibility issue, then compare alternatives if needed.

Paste a website, social media or document link to create a QR code.

Use Viettel's official app link. Tammi.cloud has no login portal and does not collect OTPs.

Compare each plan's price, cycle, allowance and eligibility.