ZenSim eSIM Data Plans for Vietnam

ZenSim does not provide a true unlimited data eSIM for Vietnam. Its “Unlimited STANDARD” plans give 3 GB of high‑speed data per day, after which the speed is reduced; they are not unlimited in the sense of offering data without limits.

Travelers can instead choose fixed‑data plans that cover the entire trip. For example, ZenSim offers a 20 GB eSIM that is valid for 10 days or 30 days, and a 10 GB plan for 10 days, both with tethering allowed. These plans can be more cost‑effective for most users, unless the traveler needs very high data usage on a continuous basis.

ZenSim does not offer any eSIM plans for Vietnam that include a phone number or SMS capability. Only data‑only eSIMs are available.

Travelers can use popular VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection for calls and messaging, as these services do not require a local phone number or SMS feature.

ZenSim offers eight single‑country plans and eight multi‑country plans that include Vietnam. The plans range in price from about $12 to $70 and carry data caps between 3 GB and 20 GB, with validity periods of 10 to 30 days. Within this selection, some plans provide a fixed data volume for the entire validity period while others impose a daily data cap that renews each day.