yaySIM does not currently offer an eSIM plan for Tonga that includes a phone number or SMS capability. Travelers looking for mobile services in Tonga will find that only data‑only eSIMs are available from this provider.
While data‑only plans allow access to the internet, calls and messages can still be made through VoIP applications such as WhatsApp, Telegram, or iMessage. It is important, however, to confirm that these apps are accessible in Tonga before purchasing, as some destinations may restrict specific VoIP services.