yaySIM does not offer any eSIM plan for Liechtenstein that includes a local phone number or the ability to send or receive SMS. All available eSIMs from the provider for that country are data‑only.
Travelers who need voice or text services can use VoIP applications such as WhatsApp, Telegram or iMessage over the data connection. However, some destinations may block or restrict certain apps or VoIP services, so it is wise to confirm that the applications you rely on work in Liechtenstein before purchasing a plan.