gosimless does not provide an eSIM for Switzerland that includes a phone number or SMS capability. The only plans available from this provider for Switzerland are data‑only eSIMs, so travelers will need to rely on VoIP applications for voice and messaging.
If you require voice or text services, you can use apps such as WhatsApp, Telegram or iMessage over the data connection. However, some destinations may block or restrict access to specific VoIP services, so it is advisable to confirm that the apps you need are accessible in Switzerland before purchasing a data‑only plan.