TailSim does not offer any eSIM plans for Switzerland that include a phone number or SMS capability. Only data‑only eSIM plans are available from this provider.
If you need voice or messaging services while traveling, you can use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection. However, some destinations may block or restrict access to certain apps or VoIP services, so travelers should verify that the services they rely on are accessible in Switzerland before purchasing a TailSim plan.