Billion Connect does not offer any Slovakian eSIM plan that includes a phone number or SMS capability. Travelers who need a number or text messages can instead purchase a data‑only plan and rely on VoIP applications such as WhatsApp, Telegram, or iMessage to make calls and send messages. Those applications generally work over a data connection, but some destinations may block or restrict certain services, so users should verify the availability of their preferred apps in Slovakia before purchasing.