Skyalo does not provide an Austria eSIM with a local phone number or SMS capability. Travelers can only purchase a data‑only eSIM plan to use during their stay. For voice and messaging, many users rely on VoIP applications such as WhatsApp, Telegram, and iMessage, which operate over the data connection. However, some destinations may block or restrict specific VoIP services, so it is important to confirm that the applications you need will work in Austria before buying a Skyalo plan.