Cheapest eSIM for Cambodia (August 2026): 8 Providers Compared From $3.98

Plan size calculator

Tell us how many days you’re in Cambodia and how you’ll use your phone, and we’ll match you to the smallest data plan that won’t leave you short. As a rough guide, short trips land around 1GB to 3GB, a week runs 5GB to 10GB, and heavy streaming or tethering points toward unlimited.

Treat this as a starting point for ordinary use with some offline maps and free hotel wifi mixed in. Planning to stream in HD or tether a laptop? Lean toward unlimited instead.

What is a Cambodia eSIM?

Land at Techo International Airport and you’re 28km south of Phnom Penh before you’ve even cleared the terminal. Fly into Siem Reap instead and it’s closer to 45km, roughly 75 minutes into town. Either way, you want data working before you hit customs, because the e-Arrival Card and your ride into town both assume you’re already online.

An eSIM is a digital SIM you install on your phone before you fly. There’s no physical card to fit, just a QR code to scan, and it connects to a Cambodia network the moment you land. Your home SIM stays put, so calls, texts and app logins on your usual number keep working.

These are travel eSIM data plans, built for maps, translation and messaging on the road rather than your voice line. They skip the roaming charges and the SIM card counter queue you’d otherwise wait through at either airport, so your internet connection is ready before you clear customs.

Is Airalo’s $19.50 10GB plan actually cheaper?

Yes, on sticker price Airalo wins both of eSIM4’s biggest fixed sizes. Its 10GB runs $19.50 against eSIM4’s $19.98, and its 20GB runs $30.50 against eSIM4’s $30.98.

The catch is validity. Airalo’s 10GB expires after 7 days and its 20GB after 15, while eSIM4’s plans run a full 30 days. Match the validity and hold both providers to 30 days, and eSIM4 is narrowly the cheaper option at both sizes, by a couple of cents rather than a clear margin.

Most Cambodia trips never get close to 10GB anyway. At every size up to 5GB, the range that covers a typical Phnom Penh, Siem Reap and coast itinerary, eSIM4 is the cheapest of the eight providers we compared.

Which Cambodia eSIM is right for your trip?

eSIM4 is the default cheapest eSIM plan in Cambodia, leading on 1GB, 2GB, 3GB and 5GB and on the 3-day unlimited plan. Two exceptions are worth knowing: Airalo undercuts eSIM4’s sticker price at 10GB and 20GB on shorter-validity plans, and GigSky beats eSIM4 on most unlimited durations beyond 3 days.

Short trip or light data

eSIM4’s 2GB plan at $5.98 (15 days) or its 3GB at $7.98 (30 days) covers a long weekend or a short Phnom Penh trip comfortably, and both are the cheapest of the eight at their size.

A typical week

eSIM4’s 5GB at $11.98 (30 days) is the cheapest of the eight, though only just. Airalo’s 5GB runs $12.00 across 7 days, effectively level on price but with far less validity.

Heavy data or a longer stay

For most people, eSIM4’s 20GB at $30.98 covers a heavy two-week trip. If you genuinely want uncapped data for a fortnight or a month, GigSky’s unlimited is the cheaper route: $32.99 for 14 days and $56.24 for 30, against eSIM4’s dearer long unlimited plans.

Families and groups

Put one eSIM on each phone rather than trying to share a single plan between devices. eSIM4 plans support tethering, so whoever’s carrying the biggest plan, typically the 20GB or an unlimited plan, can hotspot the rest of the group.

Strict single-plan budget

If you’re buying exactly one plan and want the lowest possible price, eSIM4’s 1GB at $3.98 is the cheapest entry price of the eight, with Airalo next at $4.00 for 3 days. Above 1GB, eSIM4 is the better value at every size up to 5GB.

For a wider look at coverage, apps and support rather than just price, see our full Cambodia eSIM guide. Heading overland into Laos or covering more of the region, check best eSIM for Laos or best eSIM for Southeast Asia.

How much data do you need in Cambodia?

How much data you need for traveling in Cambodia depends on your itinerary and how often you’re online.

Light trips run 1GB to 3GB, a typical week lands around 5GB to 10GB, and anyone streaming or staying a month should look at unlimited.

Cambodia leans on data more than you’d expect: the KHQR payment system the country runs on needs a live connection at the counter, and PassApp, the ride-hailing app most people use outside Phnom Penh, needs a signal to summon a tuk-tuk.

Light use: 1GB to 3GB

A weekend in Phnom Penh or a few days on the coast fits inside 1GB to 3GB: offline maps topped up with live directions, WhatsApp or Telegram, and scanning the odd KHQR code at a noodle stall.

A typical week: 5GB to 10GB

A week that mixes Phnom Penh, Siem Reap and the coast usually lands in the 5GB to 10GB band: daily navigation between cities, PassApp or Grab rides several times a day, photos and video uploaded from Angkor Wat and the other temples, and a couple of video calls home.

Heavy use or long stays: unlimited

Streaming, tethering a laptop from a cafe in Siem Reap or Kampot, or a month-long stay pushes you into unlimited territory. eSIM4’s least expensive unlimited plan is the 3-day at $10.98, but for a longer stretch GigSky’s unlimited plans, $32.99 for 14 days and $56.24 for a full month, are the cheaper way to stay uncapped.

Cambodia’s mobile networks and coverage

Staying connected in Cambodia comes down to which network your eSIM actually reaches, not just the price you paid for it.

Cambodia’s mobile connectivity runs on three cellular networks. Metfone, run by Viettel Cambodia, is the largest with roughly 10 million subscribers and over half the market. Smart Axiata is second with around 8 million subscribers, and Cellcard, the Cambodian-owned operator, holds a bit over 4 million and is strongest in the cities. Together the three cover more than 95% of Cambodian subscribers.

Cambodia switched on nationwide 5G this year, with Cellcard, Metfone and Smart launching simultaneously under a government programme in January. Coverage so far centres on Phnom Penh and the country’s main tourist provinces, including Siem Reap, Preah Sihanouk and Kampot, with 4G LTE covering the rest of the country while later phases roll out.

For rural coverage, the provinces and the islands, Metfone’s build-out gives it the edge, claiming around 98% population reach after adding towers along the border and island areas. eSIM4 connects to a major Cambodia network with 4G LTE and 5G, so you get the same underlying coverage the pricier providers rely on.

Why some cheap eSIMs feel slow or block apps

Some budget eSIMs backhaul your traffic through a server overseas to save money. That’s why a page can lag, or an app can flat-out refuse to load, treating you as if you’re sitting in a different country.

Cambodia’s KHQR payment apps and Bakong Tourist care where your traffic looks like it’s coming from, so it’s worth checking an eSIM gives you a genuine local connection before you buy. eSIM4 connects to a major Cambodia network with 4G LTE and 5G, keeping your data local instead of bouncing overseas.

Is unlimited data really unlimited?

For normal use, yes. Most unlimited travel eSIMs apply a fair usage policy: full speed up to a daily high-speed allowance, then a slower speed for the rest of that day, resetting the next morning. Maps, messaging, browsing and social rarely get anywhere near it.

If you’re planning to stream in HD constantly or tether a laptop for work, check the daily high-speed allowance and your own data usage habits before you buy. You’ll find eSIM4’s unlimited options broken down by duration in the table above, with the exact fair usage terms shown at checkout.

eSIM vs airport SIM, pocket wifi and local SIM

A Cambodian SIM, physical or local eSIM, requires passport registration at the point of sale, and airport retailers typically take cash only. That means you need dollars or riel in hand before you even have a working way to pay. A travel eSIM skips both steps entirely.

• Airport or physical SIM card. Registration means handing over your passport at the counter, and you’ll queue on arrival and swap out your home SIM, losing your usual number while it’s out.
• Pocket wifi. A rented router several people can share, which suits a group. You pay a daily rental, carry and charge a device, and it’s an awkward extra to manage across a Phnom Penh to Siem Reap to islands itinerary.
• Local Cambodia SIM or eSIM. Can include a Cambodia phone number, handy for guesthouse and boat bookings, but it usually costs more than a travel eSIM and still needs the same passport registration.

If you need a local number, eSIM4’s Yabb app add-on covers calls and texts (SMS) on a paid basis, without a separate SIM or the passport counter.

Will your phone work with an eSIM in Cambodia?

Device compatibility comes down to two things: your mobile phone has to support eSIM technology, and it has to be unlocked from any carrier. Most iPhones from the XS onward, Google Pixels from the 3 onward and recent Samsung Galaxy models all qualify. To check, dial *#06# and look for an EID number, or check Settings for an “Add eSIM” option.

If your phone came on a contract, get it unlocked before you travel, since a locked phone won’t accept a new eSIM. Your home SIM stays exactly where it is, so you keep your usual number and apps while the eSIM handles data in Cambodia.

Using an eSIM in Cambodia works the same way it does at home: install it, activate it, and your data connection switches over automatically.

How to set up your Cambodia eSIM

Install it before you fly, and file Cambodia’s e-Arrival Card at the same time so it’s done before you’re standing in an arrivals queue on a weak signal. Setting up the eSIM itself takes a few minutes, and activation is instant once you land, so you have internet access right away.

1. Buy your Cambodia plan online and get the QR code by email.
2. On your phone, go to Settings, then Cellular or Mobile Data, then Add eSIM.
3. Scan the QR code and follow the prompts to finish installing it.
4. Once you land in Cambodia, activate your eSIM as your data line and turn on data roaming for it.

If your Cambodia eSIM will not connect

Even a reliable eSIM can take a moment to grab a signal after landing. Run through these steps in order if yours hasn’t connected.

1. Give it a minute once you’re off the plane and in the arrivals hall, signal is often weak right at the gate.
2. Toggle airplane mode on and off to force your phone to search for a network again.
3. Check the new eSIM is set as your data line and that data roaming is switched on for it.
4. If it still hasn’t picked a network, go into Settings and manually select a Cambodia network such as Metfone, Smart or Cellcard.
5. In busy areas where 5G is congested, try switching to 4G LTE instead.
6. On some Android phones you may need to enter the APN manually if data still won’t flow.

Travelling with just one phone? Screenshot or save the QR code before you leave home, since you won’t have a second device to pull it up from. iPhones can add it later with a long-press, and on Android you can scan it straight from your photo gallery using Google Lens.

How we compared

This guide only covers where to buy eSIM plans for Cambodia by price.

We took each of the eight providers’ cheapest plan at every data size and duration and checked it against the field. Prices are in USD, collected in August and verified against each provider’s own Cambodia pages. eSIMply is excluded because it mirrors eSIM4 and isn’t an independent competitor, and free-trial or new-customer-only introductory tiers are excluded too. We re-check prices on a monthly basis.

Related guides

• Best eSIM for Cambodia: the full ranking on coverage, apps and support, not just price.
• Cheapest eSIM for Thailand: the same price-first comparison for the usual next stop.
• Best eSIM for Laos: for travellers continuing overland.
• Best eSIM for Asia: for a multi-country Southeast Asia trip.

About the author

Peter Moore, eSIM Content Writer

Peter has spent years testing prepaid and travel SIM options across dozens of destinations, and he writes for eSIM4 by digging into what each provider actually charges rather than what they advertise. His guides are built on real, verified pricing and network coverage data so travelers can pick a plan with confidence.