ByteSIM does not provide an eSIM for Tonga that includes a phone number or SMS capability. All of its available plans for this destination are data‑only, meaning travelers will have internet access but no local voice or text service. For voice and messaging, users can rely on VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection, though some destinations may restrict certain apps or services. Travelers should confirm that the VoIP tools they depend on are accessible in Tonga before purchasing.