GigSky does not offer eSIM plans for Estonia that provide a phone number or SMS capability; only data‑only eSIM options are available.
Travelers who need voice or text communications can use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection. Some destinations may block or restrict access to specific apps or VoIP services, so it is advisable to check that the services you rely on are accessible in Estonia before purchasing a plan.