Billion Connect does not provide a Thailand eSIM that includes a phone number or SMS capability. Travelers can only purchase data‑only plans from the provider for Thailand. Residents and visitors can still use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection to make calls and send messages. Since some destinations may block or restrict certain VoIP services, it is advisable to confirm that the apps you need are accessible in Thailand before purchasing a data‑only eSIM from Billion Connect.