On this page
- The IMEI Registration Rule Every Traveller Must Understand
- The Four Operators — Which One Should You Choose?
- Where Exactly to Find the SIM Booths at Indonesia’s Major Airports
- Step-by-Step: How the Purchase Actually Works
- 2026 Budget Reality — What You’ll Pay for Each Operator
- eSIM in 2026 — Is It Worth It Over a Physical SIM?
- Coverage Across Indonesia — Beyond Java and Bali
- After the Airport — Topping Up and Managing Your Plan
- Common Mistakes Travellers Make (and How to Avoid Them)
- Frequently Asked Questions
Landing at Soekarno-Hatta or Ngurah Rai after a long-haul flight, your phone is already searching for a signal. You need Gojek to get to your hotel, Google Maps to navigate the city, and WhatsApp to tell someone you arrived safely. International roaming is an option, but in 2026 it still costs far more than it should, and the connection is often worse. The smart move — and the one every experienced Indonesia traveller makes — is buying a local SIM card before you leave the airport. This guide walks you through every step, including a regulation most first-timers have never heard of.
The IMEI Registration Rule Every Traveller Must Understand
Since 2020, Indonesia has enforced a rule linking foreign phones to their International Mobile Equipment Identity (IMEI) number. If you arrive with a phone bought outside Indonesia and pop in a local SIM, that phone needs to be registered with the Directorate General of Customs and Excise, known in Indonesia as Bea Cukai. Without registration, Indonesian networks will eventually block your device.
For most tourists, this sounds scarier than it is. Here is how it actually applies:
Stays Under 90 Days
If you are visiting for less than 90 days — which covers the vast majority of tourists — the airport SIM booth vendor handles a temporary IMEI registration for you on the spot. This takes an extra two to five minutes and requires your passport and your phone’s IMEI number. To find your IMEI, dial *#06# on your phone or go to Settings > About Phone. Once registered, your phone can operate on Indonesian networks freely for up to 90 days.
Stays Over 90 Days
If you plan to use an Indonesian SIM on your foreign phone for longer than 90 days, a formal IMEI registration with Bea Cukai is required. You will need to pay applicable import duties: 10% VAT, 7.5%–15% Income Tax, and 0%–10% Customs Duty, all calculated on the phone’s declared value. Phones valued under USD 500 (approximately IDR 7,500,000 in 2026, depending on the exchange rate) may qualify for a duty exemption up to that threshold. This registration can be completed at the Bea Cukai office at the airport on arrival, or online at www.beacukai.go.id. Skip this step and your phone goes dark on local networks after the 90-day window closes.
For the typical two-week or one-month holiday, none of this is a burden. The booth vendor handles everything. Just bring your passport and know where to find your IMEI.
The Four Operators — Which One Should You Choose?
Indonesia has four main mobile operators, each with different strengths. Picking the right one depends on where you are going and what you need.
Telkomsel
Telkomsel is the largest network in Indonesia and consistently offers the widest coverage across the archipelago. On Java and Bali, the signal is excellent. In remote areas — think Raja Ampat, the Mentawai Islands, or highland villages in Papua — Telkomsel is almost always the only operator still showing bars. If your itinerary includes any off-the-beaten-path destinations, Telkomsel is the safe choice.
Telkomsel’s tourist-oriented prepaid SIM is called Telkomsel PraBayar Tourist. The operator also runs a fully digital sub-brand called by.U, which lets you customise your data package through an app. by.U has increased its airport presence in 2026 and suits tech-comfortable travellers who want more flexibility. For most arrivals, the standard tourist SIM at the booth is the simplest option. The official website is www.telkomsel.com and the main management app is MyTelkomsel.
Indosat Ooredoo (IM3)
Indosat Ooredoo, marketed under the IM3 brand, offers strong coverage in major cities and popular tourist zones across Java and Bali. In urban areas it competes closely with Telkomsel on speed and reliability. Packages are generally slightly cheaper than Telkomsel for the same data volume, making IM3 a solid option if you are spending most of your trip in cities and established tourist areas. The management app is myIM3, and the official site is www.im3.id.
XL Axiata
XL Axiata operates well in Java, Bali, Lombok, and other high-traffic tourist corridors. Its tourist packages — sold under the XL Prabayar Tourist banner — often include large data quotas at competitive prices and sometimes come with international call credit, useful if you need to contact home directly from an Indonesian number. The app is myXL and the site is www.xl.co.id.
Smartfren
Smartfren is Indonesia’s 4G LTE and 5G-only network. The data pricing is often the cheapest of the four operators, and speeds in urban centres can be impressive. The critical catch: Smartfren requires your phone to support VoLTE (Voice over LTE) to make calls. Many older international handsets and some mid-range models do not support VoLTE, which means voice calls simply will not work. If calls matter to you, verify compatibility before choosing Smartfren. Coverage outside major cities is also noticeably thinner than Telkomsel. The app is MySmartfren at www.smartfren.com.
Bottom line for most tourists: Telkomsel for broad travel across multiple islands. IM3 or XL for city-heavy trips where price matters. Avoid Smartfren unless you have confirmed your phone supports VoLTE and you are staying in major urban areas.
Where Exactly to Find the SIM Booths at Indonesia’s Major Airports
Knowing where to look saves you from wandering a crowded terminal after a long flight.
Soekarno-Hatta International Airport (CGK) — Jakarta
Soekarno-Hatta handles the bulk of international arrivals into Indonesia. After clearing immigration and collecting your baggage, you pass through customs. Official operator booths from Telkomsel, Indosat Ooredoo, XL Axiata, and Smartfren are positioned in the arrival hall, typically between the baggage claim area and the main exit doors. In Terminal 3 — the primary international terminal — these booths are hard to miss: they are brightly branded, staffed, and usually have a small queue during peak arrival windows.
Ngurah Rai International Airport (DPS) — Denpasar, Bali
Bali’s main international gateway has operator booths positioned similarly — in the international arrival hall after customs clearance. Telkomsel and IM3 tend to be the most consistently staffed booths here. The foot traffic at DPS is high during peak tourist season (June–August and December–January), so the queues can move slowly in the late morning and early evening when multiple international flights land close together.
Other Airports
Airports in Surabaya (SUB), Medan (KNO), Makassar (UPG), Lombok (LOP), and Yogyakarta (YIA) also have operator booths in their arrival halls, though the selection may be limited to one or two operators rather than all four. Telkomsel booths are the most reliably present across regional airports.
One firm rule: buy from official, branded operator booths inside the airport — not from individuals approaching you in the car park or on the pavement outside. Unofficial SIM sales do happen around airports, and the cards sold there are sometimes pre-registered to someone else’s identity, which creates headaches if you ever need customer support or the card gets flagged.
Step-by-Step: How the Purchase Actually Works
The process is straightforward once you know what to expect. Here is exactly what happens at the booth:
- Pick your operator booth. Based on your itinerary, choose Telkomsel, IM3, XL, or Smartfren. If you are unsure, Telkomsel is the default safe pick.
- Hand over your passport. The vendor scans or manually enters your passport details. This is mandatory — no passport, no SIM. Keep it accessible, not buried in your bag.
- Provide your IMEI. Dial *#06# or go to Settings > About Phone. The vendor enters this into the registration system for temporary IMEI clearance.
- Choose a plan. The vendor will show you available tourist packages. Ask specifically about 30-day plans with the highest data allowance for your budget. Most vendors speak functional English and can walk you through the options.
- Pay. Most booths accept cash in IDR and major credit or debit cards. If you have not exchanged currency yet, use a card — airport money exchange booths are nearby but the queues add time.
- SIM installation and activation. The vendor inserts the SIM into your phone (or guides you through eSIM activation if you requested that). The registration and activation process typically takes 5–15 minutes from start to finish.
- Test before you walk away. Open a browser, load a website, and make a test call. If anything is not working, the vendor resolves it immediately. Do not leave the booth until data is confirmed live — troubleshooting at a hotel later is slower and harder.
During peak arrival hours — typically mid-morning and early evening at CGK and DPS — allow 10–20 minutes of waiting time before your turn at the counter. The booths are staffed adequately but international arrivals can bunch together unpredictably.
2026 Budget Reality — What You’ll Pay for Each Operator
Prices below reflect 2026 market rates for tourist-oriented prepaid SIM packages with 30-day validity. Note that operators update their packages regularly, so treat these as reliable benchmarks rather than fixed prices.
Budget Tier (Under IDR 100,000)
- Smartfren: IDR 60,000–IDR 80,000 for 10GB–20GB, 30 days. Cheapest option but urban-only and VoLTE-dependent.
- XL Axiata: IDR 75,000 for around 15GB–25GB, 30 days.
- Indosat Ooredoo (IM3): IDR 80,000 for 15GB–25GB, 30 days.
Mid-Range Tier (IDR 100,000–IDR 180,000)
- Telkomsel: IDR 100,000 for 20GB–30GB, 30 days. The entry point for Telkomsel tourist SIM packages.
- XL Axiata: Up to IDR 180,000 for 30GB–60GB with local call minutes.
- Indosat Ooredoo (IM3): Up to IDR 200,000 for 40GB–80GB with calls included.
Comfortable Tier (IDR 200,000–IDR 250,000)
- Telkomsel: IDR 200,000–IDR 250,000 for 50GB–100GB with local call minutes. Best value for heavy data users or month-long trips.
For a two-week trip with moderate data use — navigation, ride-hailing, social media, some video streaming — a mid-range plan around IDR 100,000–IDR 150,000 is generally enough. Heavy streamers or remote workers should go straight for the upper tier packages and avoid running low halfway through a trip.
Top-ups, when you need them, are available from IDR 25,000 upward at Indomaret and Alfamart minimarkets, which you will find on almost every street corner across Indonesia.
eSIM in 2026 — Is It Worth It Over a Physical SIM?
eSIM adoption has accelerated considerably since 2024. By 2026, Telkomsel, Indosat Ooredoo, and XL Axiata all offer eSIM options for tourists, either directly at airport booths or via online purchase with a QR code sent to your email before you board.
The Case For eSIM
If you have an eSIM-compatible iPhone (XS and later), a newer Samsung Galaxy, or a Google Pixel, the eSIM route removes any fiddling with SIM trays and ejector pins. You scan a QR code, the profile downloads in seconds, and your phone is connected. For travellers visiting multiple countries back-to-back, keeping your home SIM active alongside an Indonesian eSIM is genuinely convenient.
International eSIM providers like Airalo, Holafly, and Nomad also sell Indonesia data plans that you can activate before you even land — useful if you need Maps live the moment you touch down. Prices from these providers tend to run slightly higher than buying direct from local operators, but the convenience factor is real. Airalo’s Indonesia plans, for example, sit around USD 8–15 (approximately IDR 120,000–IDR 225,000) for 1GB–10GB, which compares less favourably per gigabyte than a Telkomsel booth purchase.
The Case Against eSIM
Not every phone supports eSIM. If your device is more than a few years old or is a mid-range Android model, check your settings before assuming compatibility. Additionally, not all operator booths at every airport are consistently set up to handle eSIM activation for walk-in tourists — Telkomsel and IM3 at CGK and DPS are the most reliable, but smaller regional airports may still default to physical SIMs.
For most first-time visitors arriving at CGK or DPS: a physical SIM from a Telkomsel or IM3 booth is faster, confirmed to work, and often better value per gigabyte. eSIM makes most sense for repeat visitors or those arriving with a pre-purchased plan already on their device.
Coverage Across Indonesia — Beyond Java and Bali
Indonesia is 17,000 islands spread across a distance wider than the continental United States. Coverage is not uniform, and choosing the wrong operator for a remote itinerary is a common and frustrating mistake.
Where Coverage Is Strong
Java, Bali, Lombok, and the main tourist hubs across Sumatra (Medan, Palembang), Kalimantan (Balikpapan, Pontianak), and Sulawesi (Makassar, Manado) all have excellent 4G coverage from at least two operators. 5G is now live in parts of Jakarta, Surabaya, Bali, and Medan in 2026, with tourist plans from Telkomsel and IM3 beginning to include 5G access explicitly in their package descriptions.
Where Coverage Becomes Variable
Step away from the main tourist circuit and signals thin out. Mountainous areas of Java (including some parts of Bromo and Ijen trail routes), less-developed stretches of Flores, and smaller Nusa Tenggara islands have patchy 4G and sometimes only 3G or 2G. Telkomsel maintains the best reach in these areas — the difference between a Telkomsel SIM and an IM3 or XL card can literally be the difference between signal and no signal on a remote hillside.
Where Coverage Is Limited or Absent
Outer islands in Raja Ampat, deep interior sections of Kalimantan and Papua, parts of the Mentawai Islands, and certain national park zones have little to no mobile coverage regardless of your operator. If your itinerary includes these destinations, plan accordingly: download offline maps (Google Maps and Maps.me both support offline mode), save key information offline, and accept that you will be disconnected for stretches of time. This is part of visiting some of the world’s most untouched places.
After the Airport — Topping Up and Managing Your Plan
Your tourist SIM package will carry you through most trips without needing a top-up. But if you use heavy data, stream video constantly, or are staying longer than 30 days, knowing how to reload your credit is essential.
Top-Up at Minimarkets
Indomaret and Alfamart are two competing convenience store chains found on almost every major street in Indonesia. Both sell prepaid top-up vouchers for all four operators in denominations from IDR 25,000 upward. Walk in, tell the cashier your operator and how much you want to add, pay, and receive a voucher code to enter into your phone. The staff are used to this transaction — it takes about 60 seconds.
Top-Up via Operator Apps
Each operator has a management app: MyTelkomsel, myIM3, myXL, and MySmartfren. These apps let you check your remaining data balance, see your package expiry date, purchase additional data add-ons, and top up using a credit or debit card or Indonesian e-wallets including GoPay, OVO, DANA, and ShopeePay. If you have set up GoPay through the Gojek app (which most Indonesia visitors do within a day of arrival), topping up through the operator app is fast and requires no extra cash.
QRIS Payments and E-Wallets
Indonesia’s universal QR payment system, QRIS, is accepted at most operator stores, minimarkets, and even some street stalls by 2026. If you have funded a local e-wallet, QRIS scanning makes payments seamless without needing exact change.
Check Your Balance Regularly
Data quotas run down faster than most people expect when using navigation apps continuously or making video calls. Check your balance through the operator app every two to three days during a long trip. Running out of data mid-journey between cities — with no offline map and no Gojek access — is avoidable with a quick routine check.
Common Mistakes Travellers Make (and How to Avoid Them)
After years of travellers passing through Indonesian airports, certain patterns of error repeat themselves reliably.
- Buying from unofficial vendors. People approach arrivals in the car park and drop-off zones offering SIM cards, often at slightly lower prices. These cards may be registered under someone else’s name, have limited activation, or simply not work. Use only the branded booths inside the terminal.
- Not testing the SIM before leaving the booth. Activation occasionally takes a few minutes to propagate through the network. Stand at the booth, open your browser, confirm data is live. If it is not, the vendor fixes it in front of you. If you walk away and discover it is dead later, you are dealing with it alone.
- Choosing Smartfren without checking VoLTE compatibility. The lower price is tempting. Check Settings > About Phone > SIM Status or search your exact phone model online before committing to Smartfren.
- Forgetting to download essential apps on airport WiFi first. The airport has free WiFi. Use those five minutes in the terminal to download Gojek, Grab, Google Maps offline, WhatsApp, and KAI Access for train bookings. Downloading large apps on mobile data eats your quota fast.
- Assuming one SIM covers all of Indonesia equally. If you are flying from Bali to Raja Ampat or travelling through rural Flores, do not assume the coverage you experienced in Seminyak will follow you. Research coverage for your specific destination using the operator’s online coverage map before departure.
- Not keeping the passport accessible during arrival. Some travellers pack their passport deep in a bag immediately after immigration. You need it again at the SIM booth — keep it in your hand or a front pocket through the entire arrival process.
Frequently Asked Questions
Do I need my passport to buy a SIM card at an Indonesian airport?
Yes, your passport is mandatory. Every operator booth at Indonesian airports requires passport verification as part of the SIM registration process. This has been a firm requirement since 2020 and remains in place in 2026. There is no way around it — vendors cannot sell you an active SIM without checking your passport details first.
How long does the whole process take at the airport SIM booth?
If the queue is short, the entire process from joining the line to walking away with a working SIM takes roughly 15–25 minutes. During peak arrival times at Soekarno-Hatta or Ngurah Rai, you may wait 10–20 minutes before reaching the counter. Bring your IMEI number ready to keep activation quick once it is your turn.
Which operator has the best coverage for travelling across multiple islands?
Telkomsel consistently offers the widest coverage across Indonesia’s islands, including remote and rural areas where other operators lose signal. If your itinerary includes anywhere beyond Java, Bali, and major cities — particularly smaller islands, national parks, or highland regions — Telkomsel is the most reliable choice in 2026.
Can I use an eSIM instead of buying a physical SIM at the airport?
Yes, if your phone supports eSIM. Telkomsel, Indosat Ooredoo, and XL Axiata all offer eSIM options in 2026. You can purchase and activate at the airport booth or buy in advance from global providers like Airalo, Holafly, or Nomad. Physical SIMs remain slightly better value per gigabyte when bought directly from local operator booths.
What happens if my SIM stops working or runs out of data during my trip?
Top up at any Indomaret or Alfamart minimarket, found throughout Indonesia, using cash from IDR 25,000 upward. Alternatively, use your operator’s app — MyTelkomsel, myIM3, myXL, or MySmartfren — to purchase additional data packages directly, paying with a credit card or e-wallet like GoPay, OVO, or DANA. Both options take under five minutes.
