TailSim does not provide a plan with an unlimited data cap for Vietnam. All of the current Vietnam eSIM options listed by TailSim have a hard data limit, such as the 50 GB plan for 30 days, the 20 GB plan for 30 days, the 10 GB plan for 30 days, the 5 GB plan for 30 days, or the 3 GB plan for 15 days.
If a traveler needs a larger data allowance, choosing one of these fixed‑data plans is the available alternative. A fixed plan may be more economical for most users, unless the traveler expects to consume data well beyond a few dozen gigabytes.