Billion Connect does not provide a prepaid eSIM for Estonia that includes a local phone number or SMS capability. Travelers who need a line for conventional calls and texts will have to use only a data‑only eSIM and rely on Internet‑based services such as WhatsApp, Telegram, and iMessage for voice and messaging. Some destinations may block or restrict VoIP applications, so it is advisable to confirm that these apps are accessible in Estonia before purchasing a plan.