Best eSIM for Cambodia 2026: 14 Providers Compared

Smart, Cellcard and Metfone carry 4G across Phnom Penh, Siem Reap and the main Angkor temple circuit, and only Koh Rong's jungle interior and far-flung sites like Beng Mealea leave Cambodian visitors without signal. Cambodia rewards travelers who stay connected. Whether you are booking a tuk-tuk in Phnom Penh at midnight, decoding a Khmer temple inscription at Angkor Wat, checking the ferry schedule to Koh Rong, or watching a monsoon downpour roll across the Tonle Sap, mobile data quietly holds a Cambodian itinerary together. An eSIM is the simplest way to get that data: install the profile before departure, land at Techo International in Phnom Penh or Siem Reap–Angkor International, and your phone is online the moment it registers on the local network. No SIM tray, no counter queue, no passport photocopy at a shop.

Metfone, Cellcard or Smart: the nPerf 2026 results

nPerf's Cambodian barometer for April 2025 to March 2026 ranks Metfone first on overall score, statistically level with Cellcard, with Smart Axiata third (nPerf barometer, 2026). On download speed the order changes: Cellcard averaged 30.14 Mbps, Smart 29.32 Mbps and Metfone 25.37 Mbps.

Those speeds are modest next to Thailand or Vietnam, but they are plenty for maps, ride apps, messaging and photo uploads. What changes your day more is location: all three cover Phnom Penh, Siem Reap and the main Angkor circuit, while islands and remote temples are where the network your plan uses starts to matter. The networks for each Simsima Cambodia plan are listed in its details.

Paying with KHQR: why data matters at the till

Cambodia runs on QR payments. The National Bank of Cambodia's Bakong system links banks and wallets through a single KHQR code, and in August 2024 it launched the Bakong Tourists app so visitors can pay with it too, at more than 3.3 million merchant outlets according to the launch reports (Open Development Cambodia, 2024). The Bakong site publishes the app's user manual.

Scanning a code at a market stall in Kampot or a café on Pub Street needs a live connection on your phone, and shop Wi-Fi is not always offered to customers. US dollars and riel still work everywhere, so data for KHQR is a convenience rather than a must, but it saves carrying small change.

Buying a SIM at Techo or Siem Reap–Angkor airport

Smart, Cellcard and Metfone sell tourist SIMs at the arrival halls of Techo International in Phnom Penh and Siem Reap–Angkor International, and in their shops in town. Every line is registered to your passport, which the seller scans at the counter. Local data in Cambodia is inexpensive, so a SIM bought on arrival is a real alternative for travelers who need a Cambodian number.

The case for an eSIM is time and certainty: no counter after a long flight, no passport scan, and data from the moment you land, including on the road from Techo, which is far from central Phnom Penh. Compare the travel plans in the tables below with what you would pay at the counter.

Limits of an eSIM in Cambodia: no +855 number for tuk-tuk drivers

• No +855 number: tuk-tuk drivers and guesthouse owners often call or message a Cambodian number to find you; with an eSIM, share your WhatsApp or Telegram instead.
• Data only: no Cambodian calls or SMS. Grab and PassApp drivers can still reach you through the in-app chat.
• Weak or no signal in the interior of Koh Rong and Koh Rong Samloem, at Beng Mealea and Koh Ker, and along parts of the Cardamom Mountains.
• Local SIMs are cheap here, so the saving an eSIM brings is mostly time, not money.
• Your phone must support eSIM and be carrier-unlocked, and hotspot sharing depends on the plan.

Cambodia eSIM Plans Compared (2026)

Here is a comparison of the main Cambodia eSIM plans against the leading international providers. Simsima offers plans on the local networks, with transparent pricing.

Unlimited data plans

Capped data plans

These prices change regularly, so compare the row that fits your trip length and data habits. A Simsima Cambodia plan stays dormant until it first connects to a Cambodian network on arrival, which is when its validity begins.

How to install your Cambodia eSIM

Installation takes about three minutes and is best done at home on your regular Wi-Fi, before you fly. After purchase, Simsima sends a QR code and a set of manual activation credentials by email. On iPhone, open Settings, tap Cellular (or Mobile Data), then Add Cellular Plan or Add eSIM, and scan the QR code with the phone's camera. On Android, the path is similar: Settings, Connections or Network, SIM manager, Add eSIM. Once the profile downloads, label it something like "Cambodia" so you can find it easily, and leave it turned off until you land.

• Buy your Cambodia eSIM on Simsima before you fly
• Open the activation email on a device other than the phone that will use the eSIM
• Scan the QR code from your phone's eSIM setup screen while connected to Wi-Fi at home
• Label the new line "Cambodia" and leave the toggle OFF until arrival
• On landing in Phnom Penh or Siem Reap, switch data to the Cambodia eSIM and enable data roaming for that line
• Confirm you have signal in the airport, then keep your home line for SMS and calls

What if the eSIM doesn't activate on landing?

If your line shows "No Service" after landing, run through this checklist before contacting support. First, confirm the Cambodia line is toggled ON in your cellular settings and set as the data line. Second, enable data roaming for that specific line — this is required on most travel eSIMs even though you are physically in the destination country. Third, restart the phone: a reboot forces a fresh network scan and resolves most first-connection failures. Fourth, in Settings, manually select a network operator (Smart, Cellcard or Metfone) instead of Automatic. If none of that works, contact Simsima support rather than deleting the profile: a deleted eSIM cannot be reinstalled on your own.

Siem Reap, Phnom Penh and Kampot in ten days: how much data?

A common route: three days at Angkor from Siem Reap, a bus or flight to Phnom Penh for three days, then Kampot and Kep on the south coast, with a ferry to Koh Rong if time allows. Grab and PassApp rides, maps, KHQR payments, WhatsApp calls and temple photos posted every evening come to about 6 to 10 GB.

A capped plan of 10 GB valid for 15 days fits that trip. Remote workers based in Siem Reap or Phnom Penh, or anyone uploading video daily, are better served by an unlimited plan, keeping in mind that speed is reduced after the daily quota until the next day.

Apps for tuk-tuks, buses and messages

• Grab and PassApp: book tuk-tuks and cars at a fixed price in Phnom Penh, Siem Reap and Sihanoukville, without haggling.
• Bakong Tourists: pay at shops and stalls that display a KHQR code.
• Telegram: widely used in Cambodia by businesses, tour operators and guesthouses alongside WhatsApp.
• WhatsApp: works normally in Cambodia for messages and calls.
• Bus booking sites and the bus companies' own pages: tickets for buses and minivans between Phnom Penh, Siem Reap, Kampot and the border crossings.

Cambodia with Thailand, Vietnam or Laos

Cambodia is rarely the only stop. The usual crossings are Poipet to Thailand, Bavet to Ho Chi Minh City, the Mekong boat to Chau Doc in Vietnam, and the northern land border with Laos near Stung Treng. A Cambodia plan stops working when you cross, so plan for the next country before you reach the border.

For two countries, two country plans installed at home are easiest. For a longer Southeast Asia loop, a regional Asia plan avoids switching at each border; check that Cambodia and your other stops are all listed.

Asia eSIM: The Complete Guide to Multi-Country Travel in 2026

Traveling beyond Cambodia?

Get a multi-country plan and save on your mobile data.

Thailand

Vietnam

Laos

Malaysia

Thailand

Vietnam

Laos

Malaysia

Or choose another country:

Cambodia eSIM plans — Browse and compare all available Cambodia eSIM plans on Simsima

eSIM-supported devices — Check whether your phone supports eSIM before you buy a Cambodia plan

How Simsima works — Learn how to buy and install an eSIM in a few minutes, and how it activates on arrival