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 provides nine single‑country plans and nine multi‑country plans for travelers in Vietnam. The offerings include both fixed‑data packages and daily‑cap options, with prices ranging from roughly USD12 to USD70, data amounts between 3 GB and 40 GB, and validity periods from 10 to 30 days.