Wiiline does not provide plans that include a phone number or SMS capability for Serbia. Travelers looking for voice or text services will need to rely on data‑only connections and use VoIP applications such as WhatsApp, Telegram, or iMessage to make calls and send messages. Because some destinations can block or restrict particular apps, it is advisable to verify that the services you depend on are accessible in Serbia before purchasing a Wiiline eSIM.