Bali and Indonesia eSIM Guide: Telkomsel, Islands and Ferries
Bali is well connected in the places most visitors stay, from Seminyak and Canggu to Ubud and Uluwatu. Indonesia as a whole is a different story: it's an archipelago of thousands of islands, and coverage depends heavily on which network your phone can use. If your trip includes Nusa Penida, the Gili Islands, Lombok or Komodo, that choice matters more than anything else.
Which networks Indonesia eSIMs use
Indonesia's main operators are Telkomsel, Indosat Ooredoo Hutchison (brands IM3 and Tri), and XL Axiata and Smartfren, which merged in 2025. Among the wholesale Indonesia plans we track:
| Plan type | Networks | Where data exits |
|---|---|---|
| Roaming, multi-network | Telkomsel (5G), Indosat (5G), XL (4G), Smartfren (4G) and others | Singapore |
Access to several networks is very useful in Indonesia. Telkomsel is generally regarded as having the widest reach outside the big cities, so a plan that includes it improves your chances on smaller islands. In Bali's main towns, all networks are strong. Your data exits in Singapore, which works fine for maps, messaging, ride-hailing and social media.
Coverage: Bali, the islands and boat crossings
| Area | What to expect |
|---|---|
| South Bali (Seminyak, Canggu, Kuta, Uluwatu) | Strong 4G, with 5G in parts |
| Ubud and central Bali | Good in town; weaker in rice terrace valleys and on the volcano treks |
| Nusa Penida and Nusa Lembongan | Good near harbours and main villages; patchy on the cliff roads and at remote viewpoints |
| Gili Islands and Lombok | Good around the main beaches and towns; gaps inland on Lombok |
| Fast boats between islands | Signal drops for part of the crossing |
| Komodo and Labuan Bajo | Coverage in town; limited or none on boat tours |
Save fast boat tickets, hotel confirmations and driver contact details as screenshots before you board. On multi-day boat trips to Komodo, expect to be offline for long periods.
Local SIM cards and phone registration
You can buy Indonesian prepaid SIMs at Bali airport and in town. Indonesia requires phones bought abroad to be registered before they can use Indonesian SIM cards for an extended period, and the rules for visitors have changed several times. Ask the seller how it applies to you. A travel eSIM from a foreign provider roams on Indonesian networks instead, which is why many short-stay visitors choose one.
Getting around
Ride-hailing apps Grab and Gojek are the easiest way to book cars and motorbike taxis in Bali. Some areas have local rules about where app drivers can pick up passengers, and you may be directed to a designated pickup point. Both apps verify accounts by SMS, so set them up at home with your home number.
If you rent a scooter or hire a driver for the day, offline maps are a good backup. Bali's inland roads are narrow and winding, and some routes Google suggests are rough tracks.
How much data you'll need
| Trip | Suggested data |
|---|---|
| 5 to 7 days in Bali | 5 GB |
| 2 weeks, Bali plus Nusa Penida or the Gilis | 10 GB |
| A month as a digital nomad in Canggu or Ubud | 20 GB or more, plus co-working Wi-Fi |
| Sharing data with a partner | Add half again, or see our hotspot guide |
Beach photos, videos and video calls home use data quickly. Upload over villa or cafe Wi-Fi where you can. The data guide has per-activity estimates.
Combining Indonesia with other countries
Bali is often paired with Singapore or Malaysia on the way in or out. Southeast Asia regional plans vary: some include Indonesia, some don't, and some leave out Singapore. Check the country list against your itinerary. Our Singapore and Malaysia guides cover those legs.
Setting up and troubleshooting
Install the eSIM at home over Wi-Fi and switch it on after landing at Ngurah Rai Airport (Denpasar). Set it as your cellular data line and enable data roaming for it. If you see "No Service", toggle airplane mode, then try choosing Telkomsel manually from the network list. On smaller islands, manual selection of whichever network shows signal often helps. The troubleshooting guide covers the remaining steps.
Emergency calls
Indonesia's general emergency number is 112. Your accommodation can also help you reach a local clinic or hospital.
FAQ
Do Bali eSIMs come with an Indonesian phone number?
Most travel eSIMs are data-only. Local prepaid SIMs sold at the airport include a number.
Will my eSIM work on Nusa Penida?
Around the harbour and main villages, generally yes. At remote viewpoints and on some cliff roads, signal is patchy. A plan that includes Telkomsel helps.
Do I need to register my phone in Indonesia to use a travel eSIM?
Indonesia's registration rules are aimed at phones using Indonesian SIM cards. A travel eSIM from a foreign provider roams instead. For a long stay, check the current rules before you go.
Can I use Grab and Gojek with a data-only eSIM?
Yes, once your account is set up. Create and verify the account with your home number before you travel.
Will I have signal on a Komodo boat tour?
Expect little or none for much of the trip. Download maps and anything you need beforehand.