Bordersim does not offer an eSIM plan for Estonia that includes a phone number or SMS capability. The provider sells only data‑only eSIM plans for Estonia, so travelers will need to rely on data‑enabled VoIP applications such as WhatsApp, Telegram, or iMessage for calls and messaging. Some destinations may block or limit certain VoIP services, so it is advisable to confirm that the apps you rely on are accessible in Estonia before purchasing a plan.