Voyasim does not offer any eSIM plans that include a phone number or SMS capability for South Africa; all plans are data‑only. Travelers can therefore use VoIP applications such as WhatsApp, Telegram, or iMessage to make calls and send messages over the data connection. However, some destinations may block or restrict access to certain apps or VoIP services, so it is advisable to confirm that the apps you rely on work in South Africa before purchasing a plan.