Cambodia eSIM: the 2026 guide for international travelers

Below you'll find everything you need to know before buying an Airalo eSIM for Cambodia: prices updated to May 6, 2026, which carriers it runs on (Smart Axiata, Cellcard, Metfone), zone-by-zone coverage from Phnom Penh to Siem Reap (the Angkor temples) all the way to the islands off Sihanoukville, why you need offline maps for the Angkor Wat tour, and what to do if you cross the land borders into Thailand or Vietnam (the Cambodia eSIM does NOT travel with you).

I haven't tested Cambodia in person yet. This guide is built on the peer-validated cluster of traveler experiences from the fibra forum (DrBobKelso calling Airalo "a lifesaver during solo exploration" in another Asian country, ale_prince planning a multi-country trip Bangkok+ Bali backpacker-style (exactly the Cambodia profile), Airalo's official channels, and public data from the three Cambodian carriers.

60-second verdict

TL;DR — Is Airalo worth it for Cambodia? Yes, always. Cambodia is one of the cheapest markets in Airalo's catalog: the ConnectCambodia 3 GB / 30 days plan costs 9 USD, compared with roaming day-passes from major Western carriers that easily run €8+/day. For a standard 10-day Phnom Penh + Siem Reap + Sihanoukville trip you save €70–100 versus any Western roaming pass. Smart/Cellcard urban coverage is solid; offline maps are mandatory for the Angkor temples tour.

NicoInve on the fibra forum:

"Airalo is a lifesaver, everything works perfectly first try, great support and easy to use." — NicoInve, fibraforum post 2

And DrBobKelso on the solo-explorer Asia experience:

"I can only recommend it — I used it in Japan and it was my lifesaver during solo exploration when I didn't have the rental router with me." — DrBobKelso, fibraforum post 37

Cambodia has the same pattern as solo-explorer Japan for the backpacker traveler: long bus or tuk-tuk rides between Phnom Penh, Siem Reap and Sihanoukville, reliance on Maps to find your way through streets not always signposted in the Latin alphabet, constant WhatsApp communication with guesthouses and tour operators. Without a connection, you're stranded.

ale_prince on the fibra forum was talking about a multi-country trip in classic SE Asia exploration style:

"in August I'll go a couple of days to bangkok(thailand) and the other 12 to Bali( indonesia )..." — ale_prince, fibraforum post 22

The Cambodia pattern is similar: it's often part of a 2–3 country rotation ("classic Indochina" Vietnam-Cambodia-Thailand, or the SE Asia backpacker loop). In that case consider the Discover Plus regional plan instead of country-specific plans — but more on that below.

There's the rikyxxx nuance, post 48:

"Airalo is worth it if you're staying 1 or 2 weeks max picking the plan with few GB, just to use Maps and WhatsApp when you don't have wi-fi." — rikyxxx, fibraforum post 48

For Cambodia he's right: the classic 7–14 day tourist corridor is exactly the ideal use case. For 30+ day stays with heavy consumption, a local Smart or Metfone SIM at Phnom Penh airport costs next to nothing, but you lose your home number. For a global breakdown read the full Airalo review .

Airalo Cambodia prices updated to May 6, 2026

Airalo's Cambodia catalog runs under the "ConnectCambodia" brand. Below are all the sizes available in the Airalo app, prices in USD as shown at checkout:

Table updated May 6, 2026 — the Airalo catalog changes periodically. Always verify the price in the app before buying. Indicative EUR conversion at €0.955/USD.

The 3 GB / 30 days at 9 USD is the top pick for the classic 7–14 day Cambodia tour: it covers Maps + WhatsApp + a few Instagram posts + TripAdvisor searches with room to spare. The 5 GB at 13 USD is the choice for travelers uploading reels every night or wanting more headroom during the Angkor tour (where signal is patchy).

For travelers doing a multi-country SE Asia trip (Cambodia + Thailand + Vietnam), the Asia Discover Plus regional plan often costs less than the sum of country-specific plans. Check the Airalo app before buying. For active promo codes see our page current Airalo discount codes .

Which carrier Airalo uses in Cambodia

TL;DR — Which network Airalo uses in Cambodia: The Airalo ConnectCambodia eSIM primarily runs on Smart Axiata (Cambodia's #1 carrier, ~50% market share, full national coverage) and on Cellcard (#2). In some areas the device can also register on Metfone (Vietnamese Viettel's operator with Cambodian coverage). The phone picks the best network automatically.

Same logic Gabbo describes on the fibra forum applies:

"The site says that in Italy coverage is provided by WindTre, Tim and Vodafone . But how does it work? Do you pick the carrier yourself or can you connect to all 3 automatically?" — Gabbo, fibraforum post 12

Same in Cambodia. On iPhone you can force it manually from Settings > Cellular > Airalo Cambodia > Network Selection > turn off Automatic > pick "Smart" or "Cellcard".

The three Cambodian carriers in practice

Smart Axiata is Cambodia's #1 (Axiata group, same as Dialog Sri Lanka , not a coincidence: it's a Malaysian-Asian conglomerate). Best coverage in tourist areas (Phnom Penh, Siem Reap, Sihanoukville, Battambang) and best in many rural zones. 4G everywhere urban, some 5G pockets in Phnom Penh since 2023.

Cellcard (operated by CamGSM) is #2, solid urban coverage. 4G in all major cities, rural coverage more variable.

Metfone is #3, run by Viettel (Vietnamese military group with presence across several SE Asian countries). Good coverage in border areas with Vietnam, decent across the country.

Remember: in Italy, Airalo runs on WindTre/TIM/Vodafone, but the Cambodia eSIM installed before departure does not activate until you're in Cambodia.

Is Airalo better than your home carrier's roaming pass?

Cold comparison. For a standard 10-day trip in Cambodia (Phnom Penh + Siem Reap + Sihanoukville):

Italian carrier rates indicative as of May 6, 2026 — always check the official site of your carrier. US/ UK travelers: typical international day-passes (Verizon TravelPass, AT&T International Day Pass, T-Mobile Global Plus, Vodafone UK Roaming Day) cost $10–12/day and add up fast on a Cambodia trip.

For the 7–14 day backpacker / tourist in Cambodia with average consumption, Airalo ConnectCambodia 3 GB beats every Western roaming pass by ~€70–115.

For travelers doing a multi-country SE Asia trip (e.g., Bangkok + Siem Reap + Hanoi + Saigon), the Asia Discover Plus plan is often cheaper than the sum of three country-specific eSIMs. Verify in the app for the routing you're doing.

For 30+ day stays with intensive consumption, a local Cambodian Smart SIM costs almost nothing (~5 USD for 30 GB / 30 days from Phnom Penh International kiosks), but you lose your home number and bank SMS. For a detailed comparison see also Airalo vs TIM In Viaggio Mondo for Cambodia .

How to activate the Airalo eSIM for Cambodia

ilboy95 on the fibra forum recalls the golden rule:

"Installed at the airport, worked the moment we landed and for the whole trip." — ilboy95, fibraforum post 6

For Cambodia, landing = Phnom Penh International (PNH) or Siem Reap-Angkor International (SAI, 50 km from Siem Reap, opened late 2023).

iPhone procedure (iOS 17/18, Cambodia)

1. One week before departure:

• Buy the Airalo ConnectCambodia eSIM (recommended: 3 GB / 30 days at 9 USD)
• For the visa: Cambodia issues eVisas online on the official site evisa.gov.kh, you fill it out from home in 2–3 business days (~36 USD for tourism); or do visa-on-arrival at the well-worn airport kiosk (more stressful)
• Download offline in Maps: Phnom Penh, Siem Reap (the entire Angkor complex included), Sihanoukville, Koh Rong if planned

2. The night before departure, on your home WiFi:

• Airalo app → "My eSIMs" → Cambodia → "Start installation"
• The iPhone adds the eSIM in Settings > Cellular
• Important: rename it "Airalo Cambodia" so you can recognize it

3. Configure the lines:

• Settings > Cellular > Cellular Data → select "Airalo Cambodia"
• Tap "Airalo Cambodia" → turn on the "Data Roaming" toggle (CRITICAL)
• On your home line (Verizon/AT&T/T-Mobile/EE/Vodafone UK/etc.): leave data roaming OFF

4. On landing in Phnom Penh or Siem Reap:

• Airplane mode OFF, after 30–60 seconds you'll see "Smart" or "Cellcard" in the status bar
• You're online: open WhatsApp to message the guesthouse, Maps for the transfer, Grab/PassApp for the tuk-tuk

For the Android Samsung /Xiaomi procedure and more in-depth troubleshooting, go to the complete guide: how Airalo works abroad .

Angkor Wat tip: offline maps mandatory

The Angkor archaeological complex (Siem Reap) has Smart/Cellcard coverage but it's not uniform. The jungle around the more remote temples (Beng Mealea, Banteay Srei, Preah Khan) can hide the signal for 20–30 consecutive minutes.

Mandatory pre-Angkor setup:

1. On your Siem Reap guesthouse WiFi, open Google Maps
2. Search "Angkor Wat" → tap the three dots → "Download offline map" → pick a large area that includes the whole archaeological park
3. Do the same with Maps.me or Organic Maps as a secondary backup
4. Save POIs for the temples you want to visit (Bayon, Ta Prohm, Ta Som, East Mebon, Pre Rup)
5. Charge the battery to 100% and bring a power bank

During the tour, even with a weak signal, offline maps help you navigate between one temple and the next. For ride-sharing a tuk-tuk from central Siem Reap to the park, you do need the connection: Grab and PassApp work well in Siem Reap but want a stable internet.

Siem Reap (Angkor), Phnom Penh, Sihanoukville: coverage by zone

Phnom Penh

Excellent 4G Smart/Cellcard coverage everywhere: Wat Phnom, Royal Palace, Russian Market, Independence Monument, Aeon Mall, BKK1 (expat district). 5G pockets in the business center. PNH airport: full coverage.

Siem Reap (including the Angkor complex)

Siem Reap city center: full 4G Smart/Cellcard. Pub Street, Old Market, Angkor National Museum. Tourist neighborhoods (Wat Bo, Sala Kamreuk): 4G everywhere.

Angkor complex (see above): good coverage at the main temples (Angkor Wat, Bayon, Ta Prohm), weak/intermittent between temples in the jungle. Offline maps mandatory. Battambang (4–5h away): 4G in the city centers.

Sihanoukville and the islands (Koh Rong, Koh Rong Sanloem)

Sihanoukville city: excellent 4G Smart/Cellcard coverage. It's the main port and tourist zone, with a very heavy Chinese investment presence (casinos, hotels) that has densified the network.

On Koh Rong and Koh Rong Sanloem islands coverage is 4G in the main villages (Koh Touch, Saracen Bay, Long Beach) and weak/intermittent on remote beaches or inland coves. WiFi is widespread in hotels/bungalows (variable quality).

Rural areas and remote temples (Battambang, Kampong Thom, Preah Vihear)

Battambang: 4G in the city center, good Smart coverage. Prasat Preah Vihear (on the Thai border, UNESCO site): weaker coverage, mountainous terrain. Offline maps and planned backup.

Mondulkiri / Ratanakiri (the northeastern provinces, jungle and gibbon trekking): patchy coverage. Don't expect reliable connection during treks.

SE Asia land borders: the Cambodia eSIM doesn't travel to Vietnam or Thailand

Important. The Airalo ConnectCambodia eSIM is valid ONLY on Cambodian territory. If you cross a land border:

• Cambodia → Thailand (Poipet ↔ Aranyaprathet, common for travelers doing the Bangkok-Siem Reap loop)
• Cambodia → Vietnam (Bavet ↔ Moc Bai, common for travelers going from Phnom Penh to Saigon)
• Cambodia → Laos (Veun Kham ↔ Dom Kralor, less touristy)

…the connection drops. Your options:

Option 1, separate eSIM. At the start of the trip you buy a Cambodia eSIM + a Thailand eSIM + a Vietnam eSIM, and activate the right one at each crossing. More fiddly management but economically equal or better if you spend little time in each country.

Option 2, regional Asia eSIM (Discover Plus or Global). A single eSIM covers Cambodia, Thailand, Vietnam, Singapore , Malaysia, Indonesia, Laos and the Philippines. Generally costs more than the single country but far less than the sum. Optimal for classic-Indochina backpackers.

If you're also going to Thailand, here's the specific guide: Thailand eSIM . If you're also going to Vietnam, here: Vietnam eSIM .

Always check the list of countries included in the regional plan in the Airalo app before buying, because the list changes.

What to do if it doesn't activate

The Airalo Cambodia eSIM doesn't kick in on landing? Sequence:

1. Data roaming active ON the Airalo line (not the home one).

alanfibra on the fibra forum:

"Did you enable data roaming?" — alanfibra, fibraforum post 43

Path: Settings > Cellular > Airalo Cambodia > Data Roaming ON.

2. Verify active plan in the Airalo app. Status must be "Active".

3. Force manual network selection. Settings > Cellular > Airalo Cambodia > Network Selection > Smart or Cellcard.

4. Restart the phone.

5. Reset network settings. Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings.

6. Contact Airalo support via in-app chat. Replies in English, fast. Free WiFi at Phnom Penh PNH and Siem Reap SAI on arrival.

Frequently asked questions

How much does an Airalo eSIM for Cambodia cost?

The Airalo ConnectCambodia eSIM for Cambodia starts at 4.50 USD for 1 GB / 7 days and goes up to 32 USD for 20 GB / 30 days. The most popular plan among travelers is the 3 GB / 30 days at 9 USD for the classic 7–14 day Phnom Penh + Siem Reap + Sihanoukville tour. Cambodia is one of the "cheap data" markets in Airalo's Southeast Asia catalog.

Which carrier does Airalo use in Cambodia?

The Airalo ConnectCambodia eSIM primarily runs on Smart Axiata (the #1 carrier with the widest coverage) and on Cellcard. In some areas the device may also register on Metfone (Viettel's operator with Cambodian coverage). The phone picks the best network automatically.

Does the Airalo eSIM work at Angkor Wat?

Yes, with some caveats. The Angkor Wat complex has Smart/Cellcard coverage at the main temples (Angkor Wat, Bayon, Ta Prohm) but can have a weak signal in the more forested zones between temples. Download offline Maps for Siem Reap and Angkor park BEFORE the tour: it covers ride-share, navigation between temples and a fallback when the signal drops.

Is Airalo cheaper than my home carrier's roaming pass for Cambodia?

For a 7–14 day trip in Cambodia, Airalo always wins. Typical Western day-passes (Verizon TravelPass, AT&T International Day Pass, EE Roam Abroad add-on) cost $10–12/day; for 10 days you pay $100–120. The Airalo ConnectCambodia 5 GB / 30 days eSIM costs 13 USD (~€12.40). The break-even point against day-passes is broken on day one.

Does the Airalo Cambodia eSIM also work if I cross into Thailand or Vietnam?

No. The ConnectCambodia eSIM is valid ONLY on Cambodian territory. If you cross the Cambodia-Thailand land border (Poipet/Aranyaprathet) or Cambodia-Vietnam (Bavet/Moc Bai), the connection drops. You have two options: buy a separate Thailand/Vietnam eSIM, or pick a regional Asia (Discover Plus) or Global plan from the start.

Do I need to enable data roaming to use Airalo in Cambodia?

Yes. Even though the Airalo ConnectCambodia eSIM runs on local Cambodian data, the iPhone treats that line as "roaming" and requires the "Data Roaming" toggle to be ON for the Airalo line. On your home line, leave data roaming OFF so you don't pay anything.

Is there coverage in Sihanoukville and on the islands (Koh Rong)?

Sihanoukville city: excellent 4G Smart/Cellcard coverage. On Koh Rong and Koh Rong Sanloem islands, coverage is 4G in the main villages (Koh Touch, Saracen Bay), weak/intermittent on remote beaches. WiFi is common in hotels. For excursions across the island, download offline maps.

Can I keep my home number while using Airalo in Cambodia?

Yes, and it's the recommended setup. On a dual-SIM iPhone you keep the home SIM as the primary line to receive bank SMS, 2FA codes, authentication messages, disable data roaming on that line, and set the Airalo ConnectCambodia eSIM as the data line with roaming active only there. Regular phone calls are not included: use WhatsApp.

Editor: Marco Bianchi — this guide hasn't yet been tested in person in Cambodia. The activation procedures are verified on Airalo's official channels and validated against the fibraforum 42484 cluster (DrBobKelso, post 37: "lifesaver during solo exploration without the rental router" — Asia-solo-explorer Japan) + ale_prince post 22 (multi-country SE Asia trip planning) + Reddit r/cambodia. Last reviewed: May 6, 2026.

Affiliate disclaimer: the Airalo links on this page are affiliate links. The price for you doesn't change; we receive a commission that helps us keep the site running.

How much does an Airalo eSIM for Cambodia cost?

The Airalo ConnectCambodia eSIM for Cambodia starts at 4.50 USD for 1 GB / 7 days and goes up to 32 USD for 20 GB / 30 days. The most popular plan is the 3 GB / 30 days at 9 USD for the classic 7–14 day Phnom Penh + Siem Reap + Sihanoukville tour. Cambodia is one of the 'cheap data' markets in Airalo's Southeast Asia catalog.

Which carrier does Airalo use in Cambodia?

The Airalo ConnectCambodia eSIM for Cambodia primarily runs on Smart Axiata (the #1 carrier with the widest coverage) and on Cellcard. In some areas the device may also register on Metfone (Vietnamese Viettel's operator with Cambodian coverage). The phone picks the best network automatically.

Does the Airalo eSIM work at Angkor Wat?

Yes, with some caveats. The Angkor Wat complex has Smart/Cellcard coverage at the main temples (Angkor Wat, Bayon, Ta Prohm) but can have a weak signal in the more forested zones between temples. Download offline Maps for Siem Reap and Angkor park BEFORE the tour — it covers ride-share, navigation between temples and a fallback when the signal drops.

Is Airalo cheaper than my home carrier's roaming pass for Cambodia?

For a 7–14 day trip in Cambodia, Airalo always wins. Typical Western day-passes (Verizon TravelPass, AT&T International Day Pass, EE Roam Abroad) cost $10–12/day; for 10 days you pay $100–120. The Airalo ConnectCambodia 5 GB / 30 days eSIM costs 13 USD (~€12.40). The break-even against day-passes is broken on day one.

Does the Airalo Cambodia eSIM also work if I cross into Thailand or Vietnam?

No. The ConnectCambodia eSIM is valid ONLY on Cambodian territory. If you cross the Cambodia-Thailand land border (Poipet/Aranyaprathet) or Cambodia-Vietnam (Bavet/Moc Bai), the connection drops. You have two options: buy a separate Thailand/Vietnam eSIM, or pick from the start a regional Asia (Discover Plus) or Global plan that covers all three.

Do I need to enable data roaming to use Airalo in Cambodia?

Yes. Even though the Airalo ConnectCambodia eSIM runs on local Cambodian data, the iPhone treats that line as 'roaming' and requires the 'Data Roaming' toggle to be ON for the Airalo line. On your home line (Verizon/AT&T/T-Mobile/EE/Vodafone UK/etc.) leave data roaming OFF so you don't pay anything.

Is there coverage in Sihanoukville and on the islands (Koh Rong)?

Sihanoukville city: excellent 4G Smart/Cellcard coverage (it's the main port and tourist zone). On Koh Rong and Koh Rong Sanloem islands, coverage is 4G in the main villages (Koh Touch, Saracen Bay), weak/intermittent on remote beaches. WiFi is common in hotels. For excursions across the island, download offline maps.

Can I keep my home number while using Airalo in Cambodia?

Yes, and it's the recommended setup. On a dual-SIM iPhone you keep the home SIM as the primary line to receive bank SMS, 2FA codes, authentication messages — disable data roaming on that line — and set the Airalo ConnectCambodia eSIM as the data line with roaming active only there. Regular phone calls are not included: use WhatsApp.