The product spec on this page lists the Switzerland eSIM as data-only with no Swiss phone number, no incoming calls, and no SMS — but the page description also mentions a UK-based mobile number with free incoming calls. Confirm with ETravelSim support which configuration applies to the plan you select before relying on calls. For most travelers, WhatsApp, FaceTime, Telegram, and Signal handle voice calls fluidly over the data connection. Keep your home SIM active in your phone for OTPs and emergency calls, with cellular data turned off on that line.
