Best eSIM for Indonesia & Bali in 2026: Telkomsel vs Indosat

Indonesia is genuinely an island country — 17,000 of them, of which around 6,000 are inhabited. Carrier coverage in Java and Bali is excellent. Outside those islands, network choice matters a lot, and Telkomsel dominates the way Telstra dominates Australia.

The Quick Answer

A Teraroma Indonesia eSIM typically rides on Telkomsel — the country's largest and most rural-strong network.

• 3GB / 7 days: ~$7
• 5GB / 15 days: ~$11
• 10GB / 30 days: ~$19
• Excellent 5G in Jakarta, Bali, Surabaya; strong LTE-A almost everywhere tourists go

Indonesia's Major Networks

Telkomsel

The dominant carrier. Excellent everywhere — Java, Sumatra, Bali, Lombok, Sulawesi, Papua. Strongest 5G rollout. The default choice.

Indosat Ooredoo Hutchison

Strong urban network. Solid in Jakarta, Bali, Surabaya. Weaker in eastern Indonesia.

XL Axiata

Good in Java, decent in tourist Bali. Competitive pricing locally; less broadly used for travel eSIMs.

Smartfren

4G-focused, urban-heavy. Limited rural reach.

For Bali, all four work. For Komodo, Raja Ampat, deeper Sumatra, or Borneo — Telkomsel is the only realistic choice.

5G in Indonesia

5G is more limited than other major Asian markets but growing:

• Jakarta: full mid-band 5G in central districts
• Surabaya, Bandung, Medan, Makassar: 5G in central areas
• Bali (Denpasar, Seminyak, Canggu, Ubud): 5G in main tourist zones
• Most other tourist areas: LTE-A, which is fast and reliable

Real-world speeds: 100–400 Mbps in 5G areas, 30–100 Mbps in LTE-A areas.

Bali Coverage Specifics

Bali is essentially saturated:

• Seminyak / Canggu / Berawa: full 5G, often 200+ Mbps
• Ubud (central): 5G in town, LTE-A in surrounding rice fields
• Sanur / Nusa Dua: strong LTE/5G
• Uluwatu / Bukit Peninsula: LTE everywhere a tourist goes
• Amed / Tulamben (east coast): LTE; some dive resorts have weaker signal
• Munduk / North Bali: LTE in town; some inland routes have brief dead zones

Nusa Penida / Nusa Lembongan

Both islands have full LTE on Telkomsel. The viewpoints (Kelingking, Diamond Beach) all have coverage.

Gili Islands (off Lombok)

Strong LTE on Gili Trawangan and Gili Air. Gili Meno is solid but slightly weaker.

Lombok

Strong in Senggigi, Kuta Lombok, the Mawun beach area. Rinjani trekking — expect signal at the trailhead and on summit day clear weather, nothing in between.

Sizing Your Plan

Indonesia data demands:

• Bali yoga retreat / wellness: 1–2 GB/day
• Bali villa + scootering around: 1.5–2.5 GB/day
• Working remotely from Canggu: 4–6 GB/day
• Island hopping (Bali → Gilis → Lombok): 2–3 GB/day
• Komodo / Flores trip: 1–1.5 GB/day (limited signal anyway)
• Diving holiday: 0.5–1 GB/day (mostly offline)

For most 10-day Bali trips, 5–10GB is appropriate.

Cost Comparison

10 days in Bali, 8GB usage:

| Option | Cost (USD) | |---|---| | Verizon TravelPass | $100 | | AT&T International Day Pass | $120 | | Local Telkomsel Tourist SIM | $10–$15 (with passport + KTP registration) | | Teraroma Indonesia eSIM (8GB) | ~$15 |

Local Telkomsel SIMs are cheap but require KTP-linked registration that's only possible for tourists at specific airport kiosks. eSIM skips that.

Coverage by Region

Jakarta

Universal 5G. TransJakarta busways and MRT have full coverage.

Bali (full island)

Strong almost everywhere. See Bali specifics above.

Yogyakarta / Borobudur / Prambanan

Excellent in Yogya. Both major temple complexes have LTE.

Mount Bromo / Ijen Crater

LTE at the gateway towns. Sunrise viewpoints have signal; the inner caldera and Ijen blue flames have weak coverage.

Komodo / Flores

LTE in Labuan Bajo. Komodo and Rinca islands have intermittent signal; boats have signal near land, nothing in open water.

Raja Ampat

Limited. Some resorts have starlink Wi-Fi; cellular is patchy at best.

Borneo (Kalimantan / Sabah / Sarawak on the Malaysian side)

Strong in cities. Orangutan tour rivers (Kinabatangan, Tanjung Puting) have minimal cellular.

Sumatra (Medan, Lake Toba, Padang, Bukit Lawang)

Cities are solid on Telkomsel. Jungle treks lose signal.

Activation Workflow

1. Buy at Teraroma Indonesia
2. Install QR on home Wi-Fi
3. Label "Indonesia"
4. Disable until landing
5. On arrival at CGK / DPS / SUB: enable Indonesia line, disable Data Roaming on home line
6. Connects within 1–2 minutes

Common Indonesia Mistakes

Mistake #1: Buying an Indosat-based plan for outer islands. Telkomsel has dramatically better reach.

Mistake #2: Assuming Bali Wi-Fi at villas is fast. It's hit-or-miss; cellular often beats it.

Mistake #3: Trying to use foreign SIMs in Indonesian banking apps. Most require an Indonesian number.

Mistake #4: Forgetting to download offline maps for Bali scootering. Some inland routes are signal-thin.

FAQs

Will my eSIM work in remote areas like Raja Ampat or the Mentawai Islands? Spotty at best. These are some of the few genuinely off-grid destinations in Indonesia. Bring a backup device.

Can I tether to my laptop while working from Canggu? Yes. All Teraroma plans allow tethering. Most Canggu coworking spaces have decent fiber, but cellular is a useful backup.

Does the eSIM work on Indonesian ferries (Bali → Lombok, etc.)? You'll have signal near land and lose it mid-strait. The crossings are 1.5–4 hours.

What about Gojek / Grab? Both work fine on a Teraroma eSIM. You don't need a local number — most ride-hail apps accept international numbers and email-only signups.

Is Komodo / Flores covered? LTE in Labuan Bajo; intermittent on boats and islands. Plan for being mostly offline if you book a multi-day Komodo boat trip.

Ready for Bali? Browse Indonesia eSIM plans or read our best travel eSIM comparison.

Ready to buy? See every plan, price per GB and local network on our Indonesia eSIM plans page.