Instabridge does not provide a Bulgaria eSIM that includes a phone number or SMS capability. Travelers can only purchase data‑only eSIMs from Instabridge for Bulgaria. For voice and messaging, users may rely on internet‑based VoIP applications such as WhatsApp, Telegram, or iMessage, which generally work over the data connection, but some destinations may block or restrict access to these services, so travelers should confirm that the apps they need are available in Bulgaria before making a purchase.