NiftySIM does not offer any Indonesia eSIM plans that provide a local phone number or SMS capability. The company’s available packages are data‑only, allowing internet access for the duration of the validity period. Travelers who need voice or messaging services can use popular VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection. However, some destinations may block or restrict certain apps, so it is advisable to confirm that the VoIP services you rely on work in Indonesia before purchasing a plan.