Using Your Phone in Indonesia: Local SIM vs. International Roaming

You land at Soekarno-Hatta or Ngurah Rai after a long flight, and the first thing you need is data. You have to open Grab or Gojek, message your hotel, and load a map. Then you find out that Indonesia has rules about foreign phones, and your home provider’s roaming rate could turn a week-long trip into an expensive surprise. In 2026 the choice between a local SIM and roaming is still simple, but the IMEI registration rule makes the local SIM route more confusing than it needs to be. This guide explains both options and what each one involves.

How to Choose: Local SIM, eSIM or Roaming

You have two main options. You can buy a local Indonesian SIM, either physical or eSIM, or you can use international roaming from your home provider. For most visitors, a local SIM is the cheapest and most reliable way to get data and calls, especially if you stay longer than a few days.

• Local SIM: best value, strong data allowances, needs passport registration and attention to the IMEI rule.
• eSIM: no physical swap, easy to buy online, but the same IMEI requirement applies to local eSIMs.
• Roaming: works the moment you land, but is generally much more expensive, especially for data.

The IMEI Rule That Catches Tourists Out

Every phone has an International Mobile Equipment Identity number, called the IMEI. Since April 2020, foreign-purchased phones that use an Indonesian SIM card for more than 90 days must have their IMEI registered with the Indonesian Customs database (Bea Cukai). The rule exists to fight the grey market for mobile phones, not to catch tourists, but it applies to your phone all the same.

If you do not register, your phone will lose its ability to connect to Indonesian cellular networks with a local SIM after roughly 90 days. That grace period can vary and may change, so treat 90 days as a guide and not a guarantee. The SIM card itself stays active, and you can move it into a registered phone.

For 2026, the safest assumption is that any local SIM or eSIM needs a registered IMEI. This matters most if you stay longer than 30 days.

Some airport resellers and operators may offer “tourist SIMs” that are temporarily whitelisted for a limited period, such as 30 to 90 days, without the full customs registration. This is a grey area. How long the SIM keeps working in your phone beyond that period is not guaranteed. If someone offers you one, ask exactly how long it is valid and what the limits are before you pay.

Registering Your IMEI at the Airport, Step by Step

The most common and recommended route for tourists is to register at the Bea Cukai customs desk when you arrive at an international airport such as Jakarta (CGK) or Denpasar (DPS). Do the paperwork before you fly if you can.

1. Prepare online. Download the “Bea Cukai” app from Google Play or the Apple App Store, or use the web form at www.beacukai.go.id/registerimei.
2. Fill in your details. You will need your passport number, flight number and contact information. You will also need your phone’s brand, model, IMEI 1 (and IMEI 2 if it is a dual-SIM phone), and a declaration of value.
3. Get your QR code. The system generates a QR code. Present it with your passport and the physical phone to the customs officer.
4. Officer check. The officer verifies the phone and registers the IMEI.
5. Pay if needed. This depends on the phone’s value, as explained below.

To find your IMEI, dial *#06# on your phone’s keypad. Screenshot the numbers so they are ready when you need them.

What it costs

If your phone is worth under USD 500 (about IDR 7,500,000), it is generally exempt from import tax and duties, and registration is free. If it is worth more than USD 500, tax and duties apply to the amount above USD 500. The draft figures are 10% VAT, plus 7.5% to 10% income tax if you have no NPWP (Indonesian tax number), or 0% with an NPWP. You pay at the customs counter. Exact percentages for 2026, and whether the NPWP exemption is easy for tourists to use, should be confirmed with the customs officer.

The registration itself usually takes 5 to 20 minutes, depending on the queue.

The Four Operators Compared

Indonesia has four main mobile network operators. Their apps and websites are generally available in both Indonesian and English. The plans below are illustrative. Tourist packages change often, so prices in 2026 may vary.

Telkomsel

Telkomsel has the widest and most reliable coverage, and in remote areas it is often the only network you can get. A typical airport package is the “Telkomsel Tourist Starter Pack”: 25GB of data, 30-day validity, local calls and SMS, at around IDR 100,000 to IDR 150,000. Bigger packages of 50GB or 100GB run about IDR 200,000 to IDR 350,000. Website: www.telkomsel.com. App: MyTelkomsel.

by.U (Telkomsel’s digital brand)

by.U is a fully app-based prepaid service with flexible data packages. You download the by.U app, register with your passport and a local address (your accommodation works), choose a package, and pick SIM delivery to a hotel or guesthouse or pickup at a designated point such as some convenience stores and Telkomsel outlets. Delivery usually takes 1 to 3 days, then you activate in the app. It is often slightly cheaper than main Telkomsel, but it is not suited to immediate use on arrival.

Indosat Ooredoo (IM3)

Indosat is the second-largest network. It has good coverage in Java, Bali and major cities, with competitive pricing. The “IM3 Tourist Plan” offers 20GB for 30 days at roughly IDR 80,000 to IDR 120,000. Websites: www.indosatooredoo.com, or im3.id for IM3. App: myIM3.

XL Axiata

XL is strong in Java, Bali and parts of Sumatra. The “XL Tourist Pack” gives 15GB for 30 days at around IDR 70,000 to IDR 100,000. Website: www.xl.co.id. App: myXL.

Smartfren

Smartfren focuses on 4G and 5G LTE and is known for budget unlimited plans. Coverage is good in major cities and tourist hubs in Java and Bali, but much weaker in remote areas. Its “Tourist Unlimited Data” plan runs about IDR 60,000 to IDR 90,000 for 30 days, with a fair usage policy (for example, 1GB per day at full speed, then throttling). Website: www.smartfren.com. App: MySmartfren.

Where to Buy a SIM and How to Top Up

Airports. Official Telkomsel, Indosat and XL booths sit in the arrival halls at major international airports, including CGK, DPS, SUB and KNO. This is the fastest way to get connected. Show your passport (and visa if applicable), fill in a registration form, and staff handle activation and the IMEI link. Expect 10 to 30 minutes. Prices can be slightly higher than in city stores.

Official operator stores. These are GraPARI (Telkomsel), Indosat Ooredoo Store and XL Center. The process is the same, but queues are often shorter and staff may be more thorough. Expect 5 to 20 minutes.

Convenience stores. Indomaret and Alfamart mainly sell top-up vouchers. Some stock starter packs, but they usually cannot complete passport registration and IMEI linking, so buy your first SIM from an official outlet.

Topping up

• Operator apps: MyTelkomsel, myIM3, myXL and MySmartfren are the easiest route. You can pay by credit or debit card or with Indonesian e-wallets.



• E-wallets: GoPay (from Gojek), OVO and Dana can buy credit or data for all major operators.
• Indomaret and Alfamart: ask the cashier to top up your number with a set amount of credit or a data package.
• ATMs: many Indonesian bank ATMs offer mobile credit and data top-ups.

eSIM Options in 2026

An eSIM removes the need to find a booth after a long flight. Availability has grown since 2024. Telkomsel, Indosat and XL Axiata are expected to offer eSIM widely, and Smartfren has offered it for longer.

1. Check compatibility. Most newer smartphones support eSIM.
2. Buy your plan. Purchase through the operator’s website or app. Third-party providers such as Airalo and Holafly also sell Indonesian data plans, but these often route through partner networks and may not be as robust as a direct local eSIM.
3. Handle registration. For a local Indonesian eSIM, the IMEI requirement still applies. You will likely give your passport details and IMEI during purchase, or be sent to register with Bea Cukai separately. No operator is confirmed to offer a streamlined tourist eSIM process that skips the manual Bea Cukai step, so check this when you buy.
4. Scan the QR code. After purchase and registration, a QR code arrives by email. Scan it with your phone camera to install the profile.

The big advantage is that you can keep your home SIM active for calls and SMS if your phone supports dual SIM. The drawbacks are that your phone must be eSIM-compatible, and an eSIM is less immediate on arrival unless you buy and register it in advance.

When International Roaming Still Makes Sense

Roaming means your phone works the moment you land, with your home number and no local registration. That convenience is real. The cost is the problem. Roaming is generally significantly more expensive than a local SIM, particularly for data, and unlimited roaming plans are rare or very costly. Speeds also vary depending on your home provider’s agreements with Indonesian operators. Check your provider’s specific Indonesia rates and packages before you leave.

Roaming is a sensible choice in three cases:

• Very short trips of 1 to 3 days, where a local SIM is not worth the effort.
• Business travellers who must stay reachable on their home number.
• Travellers who do not want to deal with local registration.

For everyone else, a local SIM wins on price.

2026 Budget Reality: What Connectivity Costs

These are approximate 30-day tourist package prices. Packages change often, so confirm at the counter or in the app.

• Budget (about IDR 60,000 to IDR 100,000): Smartfren Tourist Unlimited Data (IDR 60,000 to IDR 90,000, with a fair usage policy) or the XL Tourist Pack with 15GB (IDR 70,000 to IDR 100,000).
• Mid-range (about IDR 80,000 to IDR 150,000): the IM3 Tourist Plan with 20GB (IDR 80,000 to IDR 120,000) or the Telkomsel Tourist Starter Pack with 25GB (IDR 100,000 to IDR 150,000).
• Comfortable (about IDR 200,000 to IDR 350,000): larger Telkomsel packages of 50GB to 100GB, useful for remote travel, remote work or heavy video use.

Coverage Across the Archipelago

Coverage varies a lot by region and operator.

• Excellent: Java, Bali, and major cities in Sumatra (Medan, Palembang), Sulawesi (Makassar) and Kalimantan (Balikpapan). 4G LTE is standard, and 5G is increasingly available in central business districts.
• Good: most provincial capitals and major tourist destinations.
• Variable or limited: many smaller islands in Eastern Indonesia (Maluku, Papua, Nusa Tenggara Timur) have limited or no coverage, or just one operator, usually Telkomsel. Mountains and deep valleys can have patchy signal. Coverage drops off at sea.

If you are going beyond Java and Bali, choose Telkomsel.

On KAI trains in Java, the tracks pass through areas with good signal. Some newer executive trains offer onboard WiFi, but mobile data is generally more consistent. Gojek and Grab depend on stable data for booking, navigation and chatting with drivers, so patchy coverage makes them hard to use. Download offline maps (such as Google Maps) for remote areas as a backup.

WiFi in Cafes, Hotels and Public Spaces

WiFi works alongside your mobile data. Most cafes, restaurants and warungs in urban and tourist areas offer free WiFi, though speeds vary widely. Hotels, guesthouses, homestays and private villas almost always provide free WiFi, and quality is generally good in mid-range to luxury places. Truly public WiFi in parks and streets is less common and often unreliable or insecure, though some shopping malls and transport hubs offer it. Use a VPN on any public or unfamiliar network to protect your data.

What Has Changed Since 2024

• IMEI enforcement: the rule dates from 2020, but practical enforcement and the clarity of the tourist process have evolved. For 2026, full registration at customs on arrival is the official and safest route for any local SIM or eSIM, especially for stays over 30 days. The reliability of temporary tourist SIMs that skip it remains uncertain.
• 5G: networks have expanded beyond the early pilot cities, with faster speeds in central Jakarta, Surabaya, Denpasar and other major hubs. Expansion is expected to continue.
• Digital-first services: by.U and wider eSIM availability show a move to app-managed mobile service.
• Plans: no major operator or widely used tourist SIM option has been significantly discontinued, but specific data packages change frequently.

Common Mistakes to Avoid

• Skipping IMEI registration. Your phone may stop working on local networks after about 90 days.
• Buying a starter pack at Indomaret or Alfamart. They often cannot complete passport registration, so use an official outlet.
• Trusting an undefined “tourist SIM.” Ask for the exact validity period and limits.
• Choosing by price alone for remote trips. Smartfren is cheap but weak outside cities. Choose Telkomsel for the outer islands.
• Ordering by.U on arrival day. Delivery takes 1 to 3 days.
• Relying on third-party eSIMs as a perfect match. They may use partner networks and be less robust than a direct local eSIM.
• Skipping offline maps. Signal can vanish in mountains and at sea.
• Not setting up e-wallets. GoPay and OVO are useful for top-ups, ride-hailing and food delivery.

Confirm the latest rules with the operator or the customs desk when you land, since both plans and regulations can shift.

Frequently Asked Questions

Is a local SIM or international roaming better in Indonesia?

For most travellers, a local SIM is better. It is generally much cheaper, especially for data, and gives you a solid allowance for maps and ride-hailing. Roaming only makes sense for very short trips of 1 to 3 days, business travellers who need their home number, or anyone avoiding local registration.

Do I need to register my phone’s IMEI as a tourist?

Yes, the safest assumption is that you do. Since April 2020, foreign phones using an Indonesian SIM for more than 90 days must have their IMEI registered with Bea Cukai. Tourists can register at the customs desk on arrival or beforehand through the Bea Cukai app or www.beacukai.go.id/registerimei.

Which Indonesian operator has the best coverage?

Telkomsel has the widest and most reliable coverage, and it is often the only network on remote islands. Indosat IM3 and XL are good in Java, Bali and major cities. Smartfren is cheap but much weaker outside cities and tourist hubs. Choose Telkomsel if you travel beyond Java and Bali.

Can I use an eSIM in Indonesia?

Yes. Telkomsel, Indosat and XL Axiata are expected to offer eSIM widely in 2026, and Smartfren has offered it longer. Your phone must support eSIM, and the IMEI registration requirement still applies to local eSIMs. Third-party providers such as Airalo and Holafly also sell Indonesian plans, though they may be less robust.

How much does a tourist SIM cost in Indonesia in 2026?

Typical 30-day tourist packages run from about IDR 60,000 to IDR 150,000 for budget and mid-range plans. Larger Telkomsel packages of 50GB to 100GB cost about IDR 200,000 to IDR 350,000. Prices are illustrative and change often, and airport prices may be slightly higher than in city stores.

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📷 Featured image by Grab on Unsplash.