GigSky does not provide a Brunei eSIM that includes a local phone number or SMS capability. Travelers can only purchase data‑only plans from GigSky for Brunei. However, they can still use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection for voice and messaging. Some destinations may block or restrict certain apps, so it is advisable to confirm that the services you rely on are accessible in Brunei before buying a plan.