SIM cards and eSIMs in Indonesia: tourist plans, IMEI rules and coverage

Roam, travel eSIM or local SIM: the quick choice

There are three ways to get online, and Wikivoyage's Indonesia guide sums them up well: roam on your home provider, buy an eSIM from a travel eSIM company before you arrive, or buy an Indonesian SIM card after landing, which usually gives the best coverage and prices. All three work in the cities. The difference shows on the outer islands and in the paperwork.

Roaming costs nothing to set up and, according to Indonesian Customs, a phone that keeps its home-country SIM does not need IMEI registration. It is the easy choice for a few days in Jakarta or Bali if your home plan includes Indonesia at a sensible price. A travel eSIM also skips the local registration and is active as soon as the plane lands, but it runs on a local network, so check which one and its coverage before you buy if you are heading beyond Java and Bali. A local SIM needs your passport and a few minutes at a counter, but gives you an Indonesian number, which helps when guesthouses, drivers and boatmen want to call or message you, and when an app sends its login code by SMS.

If you have a dual-SIM or eSIM-capable phone, the most robust set-up is to keep your home SIM for bank codes and use the Indonesian line for data. Make sure the phone is not locked to your home carrier before you travel, or an Indonesian SIM will not work in it.

• Short city or Bali trip: roaming or a travel eSIM, set up before departure.
• Two weeks or more, or any outer island: a local tourist SIM, ideally Telkomsel, bought on arrival.
• Long stay (over 90 days on a local SIM): register the phone's IMEI with Customs when you land, then buy a regular local plan.

Buying and registering an Indonesian SIM

Prepaid SIM cards in Indonesia must be registered to the user. The Ministry of Tourism's connectivity page says foreigners register with a passport (or a KITAS or KITAP for long-stay residents), that the officer at the operator's booth guides you through the process, and that airports have booths of several providers, naming Telkomsel, XL, Smartfren, Tri, Axis and Indosat's IM3. Have your passport out at the counter and let the staff insert and activate the card before you walk away; test mobile data and a call while you are still there.

Wikivoyage describes the market as three operator groups: Telkomsel; Indosat Ooredoo Hutchison, which runs the IM3 and Tri brands; and XLSMART, which runs XL, AXIS and Smartfren. It also explains the trade-off at the airport. The booths there sell tourist plans, which are expensive by local standards but cheap by Western ones, and their validity often cannot be extended. Regular local prepaid plans are much cheaper and can be topped up at minimarts, but to buy one you have to visit an operator's service centre in town. As an example, Wikivoyage quotes a 2026 Telkomsel tourist plan of 25 GB for 28 days at Rp 150,000 against a local plan of 70 GB for Rp 80,000; treat these as an illustration, not a current price list. For most holidays the airport plan is worth the convenience.

Telkomsel also lets visitors order a tourist SIM before they travel. When we checked on 2026-10-03, its SIM registration page for foreigners offered a pre-ordered special SIMPATI card with 25 GB of data, 25 minutes of domestic calls and 25 minutes of international calls, valid for 30 days, for Rp 100,000, and said that pick-up was available only in the Bali and Mandalika (Lombok) areas.

An Indonesian operator's own eSIM is not the shortcut it sounds. When we checked on 2026-10-03, Telkomsel's eSIM page said registration of its eSIM starter pack requires an Indonesian ID card (KTP) and family card (KK), which visitors do not have. If you want an eSIM, buy it from a travel eSIM provider before you fly, or ask at a Telkomsel service centre (GraPARI) whether it can issue one against your passport.

Your phone and the 90-day IMEI rule

Indonesia keeps phones brought in from abroad off its mobile networks unless their IMEI, the device's identity number, is registered. Indonesian Customs (Bea Cukai) states that phones, handheld computers and tablets brought in from abroad must have their IMEI registered to get Indonesian mobile network access. For visitors, though, its IMEI FAQ lists two exceptions: no registration is needed if the device keeps using its home-country SIM (roaming), or if a foreign tourist's device uses an Indonesian SIM registered at a mobile operator outlet, which gives network access for up to 90 days, under Communications Ministry Regulation No. 1 of 2020.

In practice, then, a normal holiday needs nothing beyond the passport registration at the SIM counter. Wikivoyage adds two practical points: the phone loses service on the local SIM after 90 days if it has not been registered, and if you leave and come back (on a visa run, for example) so that your total time in the country goes over 90 days, you should register too.

If you will stay longer, register on arrival rather than later. Customs explains that you declare the device in the All Indonesia arrival declaration and then complete IMEI registration and any duty at the counter in the international arrival terminal, with your passport and boarding pass. Registration itself is free, but import duty applies: when we checked on 2026-10-03, the customs page listed 10 percent import duty and 12 percent VAT (on a base multiplied by 11/12), with US$500 deducted from the customs value of a passenger's personal goods. That allowance is only given if you declare the device when you arrive; Customs also allows registration up to 60 days after arrival, but then without the exemption. If your passport and IMEI were scanned at the airport, you have up to five days to finish the process at a customs office and keep the allowance.

Coverage: choose the network for the remotest place on your route

In the big cities any operator works. The choice matters once you leave them. Wikivoyage's Indonesia guide says that beyond the major cities Telkomsel is the most reliable network and in many places the only one operating, that 4G is widespread on Java and Bali and in cities and some rural areas elsewhere, but may be missing in remote places and parts of eastern Indonesia, and that 5G is concentrated on Java and Bali, with only major city centres covered on other islands.

Destination guides say the same thing about specific places. Wikivoyage's Sumba guide recommends Telkomsel because other operators have limited coverage on the island, and warns that bad signal is one reason not to ride a motorbike there if you are inexperienced. Its Mount Rinjani guide says mobile coverage in the national park is very limited, with Telkomsel usually better and getting some reception at both crater-rim campsites, depending on your device.

Plan for the gaps rather than hoping for signal. Before a trek, boat trip or stay on a small island, download offline maps of the area, save your booking confirmations and the phone numbers of your guesthouse, boat operator and guide, and buy enough data in advance, since topping up needs a connection or a shop. Agree pick-up times and meeting points in person, because you may not be able to message from the boat or the trail. If one network matters a lot to you, a second SIM from another operator is a cheap backup.

The apps that need your data

Ride-hailing. Wikivoyage says car and motorbike ride-hailing works in more than 200 Indonesian cities, with Gojek and Grab dominating and the taxi company Bluebird serving a more upmarket market through its own app, and that the apps take cash, international cards and local payment methods. It also warns of people at pick-up points who pretend to be your Grab driver: real drivers do not normally get out and look for passengers, so check the driver's name and the licence plate shown in the app before you get in. Both companies also run food delivery, which is handy on a rainy evening or after a late arrival.

Trains. The state railway KAI promotes its Access by KAI app for booking tickets on its website; install it before your first rail journey on Java.

Ferries. ASDP, the state ferry operator, sells tickets through its Ferizy service. When we checked on 2026-10-03, the Ferizy site said check-in happens at the port within the check-in time printed on the e-ticket, that the ticket expires if you have not checked in by then, that you must show an identity document matching the ticket, and that it verifies your mobile number when you log in. Set it up while you have a reliable connection, not at the harbour.

Arrival. The All Indonesia arrival declaration is online. The Ministry of Tourism says it can be completed up to three days before you arrive at allindonesia.imigrasi.go.id, on a phone or a laptop, and advises saving proof of submission or a screenshot, so you are not dependent on airport Wi-Fi in the queue.

For paying inside these apps and topping up e-wallets, see our guide to money and payments in Indonesia.

Wi-Fi, VPNs, charging and emergency numbers

Wi-Fi is a useful backup, not a plan. The Ministry of Tourism says most international airports in Indonesia provide Wi-Fi and most major city hotels offer free Wi-Fi, with the password given at check-in; smaller hotels in small towns commonly provide it too, but you should check before booking. Malls, cafés and restaurants in the cities often have free hotspots, and the ministry warns that public networks are not always secure, so avoid banking on them. It also mentions pocket Wi-Fi rental, ordered online and delivered or collected on arrival, as a way to stay connected anywhere.

Indonesia censors parts of the internet. Wikivoyage reports that tens of thousands of sites are blocked, including some mainstream services, and that messaging and social apps have been temporarily blocked during unrest in the past, as in 2019; it suggests setting up a VPN before you travel.

Bring the right plug. The Ministry of Tourism says the standard supply is 230 V at 50 Hz and most sockets are types C and F, the European two-pin design; adapters are sold in local minimarts. A power bank is worth carrying on boat days and long bus rides, where you may navigate and photograph for hours without a socket.

Save the emergency numbers before you need them. The ministry lists 110 or 112 for police and general emergencies, 118 or 119 for ambulances, 113 for the fire brigade and 115 for search and rescue (BASARNAS). To call an Indonesian mobile number from a foreign SIM, dial +62 and drop the leading 0.