Travelling to Indonesia from the UK? Here's the Smartest eSIM Setup
The UK traveller's guide to staying connected in Indonesia — coverage on Telkomsel, pricing in £, real cost vs UK roaming, install steps and FAQs.
Published 2026-07-27 · Updated 2026-07-27 · TripSIM Team
Answer: The best eSIM for Indonesia in 2026 is one that activates before you fly, runs on a tier-1 local carrier such as Telkomsel, and is billed in £ with no surprise add-ons. TripSIM ticks all three: scan a QR code, land in Jakarta, and you have working data the moment you turn off airplane mode — no SIM tray, no kiosk, no roaming charge.
Indonesia eSIM at a glance
- Region: Asia
- Capital: Jakarta
- Local currency: Indonesian Rupiah (IDR)
- Language: Indonesian (Bahasa Indonesia)
- Timezone: WIB/WITA/WIT (UTC+7 to UTC+9)
- Main mobile networks: Telkomsel, Indosat Ooredoo, XL Axiata
- Typical UK-tourist data use: 1–2 GB per day
- Typical trip length: 10–21 days
- UK roaming cost without an eSIM: £8–£12 per MB
- TripSIM saving: Save up to 90% vs UK roaming
Why UK travellers need mobile data in Indonesia
Bali and Indonesia are bucket-list destinations for UK travellers. TripSIM provides instant eSIM activation with 4G coverage across Indonesia's main islands.
- Connect in Bali, Lombok, and Java
- Book villa stays and tours
- Navigate Ubud's rice terraces and beaches
Indonesia mobile coverage and networks
Answer: TripSIM connects to Telkomsel, Indosat Ooredoo, XL Axiata in Indonesia, giving you 4G/5G data across Bali, Jakarta, Yogyakarta, Lombok and most populated areas. Expect strong signal in cities, along motorways and on main rail corridors. Remote regions, deep tunnels and some mountain passes may drop briefly to 3G or no signal — this is the same behaviour any local SIM would show.
- Telkomsel — 4G/5G, primary carrier in Bali and surrounding regions
- Indosat Ooredoo — 4G, primary carrier in Bali and surrounding regions
- XL Axiata — 4G, primary carrier in Bali and surrounding regions
Indonesia eSIM vs UK roaming: real cost in £
Answer: Save up to 90% vs UK roaming. Most travellers spend £4–£15 on a TripSIM Indonesia plan instead of £40–£250 on UK roaming for the same trip. The reason is simple — UK carriers charge £8–£12 per MB once you leave EU roaming zones, and Indonesia is outside most UK "roam-like-at-home" bundles. A 5 GB TripSIM Indonesia plan replaces what would otherwise be £8–£12 per MB × thousands of MB.
- Quick check-in trip (3 days, ~3 GB): TripSIM ~£4–£8 vs UK roaming ~£60+
- Standard holiday (7 days, ~10 GB): TripSIM ~£8–£15 vs UK roaming ~£150+
- Long trip / digital nomad (14+ days, unlimited): TripSIM single fixed price vs uncapped roaming charges
- Heavy maps + video calls user: still capped at the TripSIM plan price — no bill shock
How much data do you need for Indonesia?
Answer: For a typical UK tourist in Indonesia — Google Maps, WhatsApp, Instagram, the occasional video call home and translation apps — plan for around 1–2 GB per day. A 10–21 days trip is comfortably covered by our mid-tier 5–10 GB plans. Heavy users (4K video, daily FaceTime, mobile hotspot for a laptop) should pick an unlimited plan.
Typical app data usage
- Grab in Bali: ~2 MB per ride
- Google Maps for scooter navigation: ~5 MB per hour
How to set up your TripSIM Indonesia eSIM
Answer: You can install your Indonesia eSIM in under five minutes. Buy on tripsim.co.uk, open the email we send you, scan the QR code with your phone's camera, and label the line "Indonesia". Activate it when you land at Bali airport — your phone connects to Telkomsel automatically.
- Step 1 — Check your phone is eSIM-compatible (every iPhone XS or newer, Pixel 4+, Galaxy S20+ and most 2020+ Android flagships).
- Step 2 — Buy your Indonesia plan at tripsim.co.uk and pay in £.
- Step 3 — Open the activation email (arrives within minutes) on a second device or print it.
- Step 4 — Settings → Mobile Data → Add eSIM → scan QR code → label it "Indonesia".
- Step 5 — Turn data roaming ON for the TripSIM line only, keep your UK line for SMS verification, and you're done.
Travel tips for Indonesia from the TripSIM team
- Grab is the main ride-hailing app in Bali
- Download offline maps for remote areas
Save data while exploring Indonesia
- Grab in Bali: ~2 MB per ride
- Google Maps for scooter navigation: ~5 MB per hour
When to visit Indonesia
April–October (dry season). November–March is rainy season.
Indonesia entry requirements for UK passport holders
UK citizens can get a visa on arrival for 30 days (extendable) or apply for an e-Visa.
Indonesia eSIM frequently asked questions
Will my UK phone work with a Indonesia eSIM?
Yes — if your phone is eSIM-compatible (any iPhone XS or newer, Google Pixel 4+, Samsung Galaxy S20+ and most 2020-onward Android flagships) and network-unlocked. Phones bought outright from Apple, Google or the Samsung UK store are unlocked by default. Contract handsets from EE, Vodafone, Three or O2 are unlocked automatically as well.
How quickly is the Indonesia eSIM delivered?
Activation details land in your inbox within a few minutes of paying. We recommend installing the eSIM at home on UK WiFi before you fly, then activating it when you land in Bali.
Can I keep my UK number while using a TripSIM Indonesia eSIM?
Yes. Modern phones run two SIM profiles at once. Keep your UK SIM as the default voice/SMS line for bank verifications and use the TripSIM eSIM as your data line. WhatsApp, iMessage and your normal apps keep working on your UK number.
Does the TripSIM Indonesia eSIM include calls or texts?
TripSIM is a data-only eSIM — no traditional voice minutes or SMS, and no emergency-call routing through this line. Use WhatsApp, FaceTime, Google Voice or Microsoft Teams for calls. Keep your UK SIM active for SMS one-time codes and 999/112 emergency dialling.
Does TripSIM work across all Indonesian islands?
Coverage is excellent in Bali, Java, and Lombok. Smaller remote islands may have limited signal.
Verdict: the best eSIM for Indonesia in 2026
For UK travellers heading to Indonesia, TripSIM is the simplest path to reliable data: priced in £, instant QR delivery, 4G/5G coverage on Telkomsel, and no risk of a £200 roaming bill on the way home.
Get your Indonesia eSIM
Ready to travel? Open our Indonesia eSIM page, pick the data allowance that matches your trip length, pay in £ at our UK Stripe checkout, and you'll have your QR code by email within minutes. Activate before you fly or on landing at Bali — your choice.