Indonesia is over 17,000 islands and that changes the connectivity story
Indonesia spans 5,000 km west to east — the same distance as London to Riyadh — and includes Sumatra, Java, Bali, Borneo, Sulawesi, the Lesser Sundas, the Moluccas, and Papua. A typical traveler doesn't see most of it; a typical traveler sees Bali plus a side trip to Java or Lombok. But the eSIM doesn't care which islands you pick. It hands over from one network footprint to the next without you opening a setting.
Roamzy charges $2.46 per gigabyte in Indonesia. That's $0.0024 per megabyte, billed in real time as your phone uses data on Indonesian networks. No subscription, no expiry, no 5 GB minimum bundle you wouldn't drain in a week in Ubud anyway. One per-MB rate across 192 countries isn't a marketing line — it's the shape of the invoice.
How much will Roamzy actually cost on this trip?
A typical visitor to Indonesia uses 0.7–1.5 GB per day: Maps from Denpasar to Ubud, the camera-translator on a warung menu, Gojek or Grab for everything (food, rides, parcels), the Pelni or Garuda app for inter-island travel, contactless payments where they're accepted, the occasional video call. Call it 1 GB/day for the math:
| Trip length | Roamzy ($2.46/GB) | Tourist roaming pass | Airport local SIM |
|---|---|---|---|
| 3 days | $7.38 | $15–40 | $10–25 + paperwork |
| 1 week | $17.22 | $25–60 | $15–30 + paperwork |
| 2 weeks | $34.44 | $45–120 (often two passes) | $20–35 + 30-day cap |
Competitor prices in columns 3 and 4 are 2025 ranges based on typical offerings; exact figures depend on your home carrier and the airport store you visit. Roamzy's rate in column 2 is our actual published rate from the pricing page.
Bali airport (DPS) and Jakarta (CGK) both have SIM kiosks with reasonable tourist tariffs — the catch is the queue, the passport copy, the registration form, and the 30-day cap that doesn't help anyone on a five-day Bali trip. eSIM skips that entirely.
How does connectivity work across the archipelago?
For a user, the practical thing is one eSIM that hands over between Java networks and Sumatra networks and Bali networks without you doing anything. You'll notice it on inter-island flights and ferries: the eSIM picks up the new network within 30–60 seconds of landing.
How is coverage distributed by region?
| Region | 5G | LTE | Notes |
|---|---|---|---|
| Bali (south + Ubud) | Yes (centers) | Solid | Tourist density means strong coverage |
| Jakarta, Surabaya, Bandung | Yes | 100% | Capital and major Java cities |
| Yogyakarta, Solo | Yes (centers) | Solid | Cultural hubs, well covered |
| Lombok, Gili Islands | Patchy | OK | Solid in towns, weaker on the Gilis |
| Komodo / Flores | No | Patchy | Labuan Bajo OK; boats and remote bays drop |
| Sumatra (Medan, Padang) | Limited | Solid in cities | Highlands and back-country drop |
| Borneo (Kalimantan) | No | Variable | River travel — workable in towns, gone between |
| Papua | No | Patchy | Towns OK; highlands and jungle — none |
If your trip includes diving, trekking, or Komodo boat days, plan for offline maps and pre-downloaded itineraries. That's not a Roamzy problem — that's Indonesian geography.
Things you'll feel about Indonesia specifically
- Gojek runs the country. Rides, food, pharmacy delivery, parcel pickup. Foreign cards work for top-up; cash is also accepted.
- WhatsApp is universal. Hosts, drivers, dive operators all use it.
- Bali Wi-Fi is uneven. Cafés in Canggu and Ubud are excellent. Beach hotels and remote villas — wildly variable.
- Camera translator earns its keep on Bahasa signage, especially outside the major tourist zones.
- Inter-island flight reschedules happen often — the airline app in your pocket is more useful than waiting at the gate.
How do I install my Roamzy eSIM?
| Plug type | Voltage | Frequency | iOS | Android |
|---|---|---|---|---|
| Type C, F | 230 V | 50 Hz | iPhone XS+ | Pixel 3+, Galaxy S20+ |
- Sign in to Roamzy via Telegram or Google
- Top up the eSIM with a minimum of 20 USDT — stablecoins, no cards, no banks, no FX surcharges
- The QR code appears in the dashboard once payment confirms
- Settings → Cellular → Add eSIM → scan QR (do this before you fly)
- The counter starts the moment you land at DPS, CGK, JOG, or SUB
Supported stablecoins, networks, and common iPhone/Android setup errors are in the FAQ.
Why is the article structured this way?
An Indonesia trip is already cognitive load: a stack of inter-island flights and ferries that don't always run on schedule, a payments stack that runs on apps and cash in different proportions by location, a stack of permit and visa-on-arrival rules that change by the year. Connectivity should be the one thing that just works.
Roamzy is built around that. No first-purchase promo to lure you, then jacked rates on the second top-up. No fine-print throttling. No auto-renewal you forgot to cancel. One rate, billed by the megabyte, balance carries.
That's an engineering preference for not having features. You can't price below this without re-introducing the small print, so we don't.
What if my trip continues to other countries?
Indonesia often pairs with neighbors. Same Roamzy account, same logic at the border:
- Malaysia — short ferry from Sumatra to Penang or flight from Jakarta
- Singapore — common transit point
- Thailand — frequent extension by air from Bali or Jakarta
- If you want the underlying mechanics — how roaming actually gets priced and why it hurts