Check with your local cell phone provider for roaming service while visiting Indonesia. Dewi Nusantara is equipped with a satellite-based phone for emergency communications. WiFi (based on mobile phone signal) is available free of charge when we have a 3G or 4G signal, but it can be very slow. It is suitable for sending WhatsApp messages but may not work for uploading photos to Facebook etc.
Upon arrival, tourist SIM cards are available at airports – the mobile phone provider Telkomsel works best in remote areas (see here: https://www.telkomsel.com/en/perdana/tourist-prepaid-card)
In addition to the free-of-charge WiFi, Dewi Nusantara is equipped with Starlink satellite internet. Pls. contact the team onboard if you would like to purchase a Starlink voucher for your trip.