esimzon does not provide a Vietnam eSIM that includes a phone number or SMS capability. All of its Vietnam plans are data‑only, which means you will not receive a local phone number or be able to send or receive SMS messages with the plan.
Travelers who need to communicate can use VoIP applications such as WhatsApp, Telegram or iMessage over the data connection. Because some destinations may block or restrict certain apps, it is advisable to check whether the VoIP services you rely on are accessible in Vietnam before purchasing a plan.