ViaConecta does not offer a Serbia eSIM plan that provides a local phone number or SMS capability. The only eSIM options available from this provider for Serbia are data‑only plans, so travelers cannot receive or make traditional voice calls or SMS. They can still use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection for calling and messaging, though some destinations may block or restrict access to particular apps or services, so it is advisable to check that the apps you rely on work in Serbia before purchasing.