Yatelo does not provide a true unlimited data eSIM for Vietnam. The plans listed under the “Unlimited” name all have hard caps of 2GB or 3GB; once the amount is used, the connection speed is reduced to 384 kbps (or 1000 kbps for the 3GB options).
Instead, Yatelo sells fixed data plans that can be more economical for most travelers. For example, the VNM 50GB 30 days plan and the ASI 20GB 30 days plan give large high‑speed data allowances (20 GB or 50 GB) for a month of validity, with 5G coverage in Vietnam. These fixed plans avoid the speed reduction seen in the “Unlimited” packages and can be a better choice unless a user expects to consume more than the capped amounts.