aloSIM does not provide an eSIM for Tonga that includes a phone number or SMS capability. Travelers can only purchase a data‑only eSIM from the provider. If they need voice or text communication, they would need to use VoIP applications such as WhatsApp, Telegram, or iMessage, which generally work over the data connection. However, some destinations can block or restrict specific VoIP services, so travelers should confirm that the apps they rely on are accessible in Tonga before buying a plan.