There are no eSIM plans from yaySIM that include a local phone number or SMS capability for New Caledonia. The only available choice is a data‑only eSIM that provides internet access for the duration of the validity period.
Travelers who need to make voice calls or send text messages can use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection. However, some destinations may restrict or block certain apps or VoIP services, so it is advisable to confirm that the applications you rely on are accessible in New Caledonia before purchasing a plan.