Destination
Cambodia eSIM: mobile data at Angkor, Phnom Penh and the islands
Mobile data in Cambodia: where coverage is solid in Phnom Penh and Siem Reap, what to expect at remote Angkor temples and on Koh Rong, local SIM with a passport and eSIM for Indochina.
Plan for your trip: Cambodia · Data for your trip — See plans →
Mobile data in Cambodia works reliably for travelers in Phnom Penh, Siem Reap, Kampot and along the main highways, and gets weaker at remote temples, in the jungle and on the islands. The classic route of Phnom Penh, Angkor and the coast is mostly covered, but on Koh Rong and in Mondulkiri and Ratanakiri provinces coverage is no longer everywhere. The easiest way to get connected is a travel eSIM installed at home, while a local SIM requires your passport.
Where does mobile signal work in Cambodia, and where doesn’t it?
Mobile data in Cambodia works reliably in cities and along the national highways, while in the countryside, the jungle and on the islands coverage depends on where you are. The country’s main carriers are Smart, Cellcard and Metfone, and all of them run 4G networks. The usual tourist route mostly runs through areas with signal.
| Place | What to expect | What to do in advance |
|---|---|---|
| Phnom Penh | Reliable in the city, slower at peak hours | Nothing special, an installed eSIM is enough |
| Siem Reap, Pub Street | Stable in town | Offline map of Siem Reap and the surroundings |
| Main Angkor temples | Usually signal at Angkor Wat, Bayon, Ta Prohm | Angkor ticket as a screenshot |
| Beng Mealea, Koh Ker, Phnom Kulen | Signal weakens in the forest and on remote roads | Driver’s contact and route offline |
| Kampot, Kep | Signal in town, weaker on Bokor Mountain and at pepper farms | Offline map of the province |
| Sihanoukville | Data works in town | Boat schedules to the islands |
| Koh Rong, Koh Rong Samloem | Signal at villages and piers, weak or none on remote beaches | Bungalow booking and boat schedule offline |
| Mondulkiri, Ratanakiri | Signal in towns, drops in the jungle and at waterfalls | Tell family about your trek |
Actual connection quality in Cambodia depends on the carrier, the location and the weather: during the rainy season, roughly May to October, heavy downpours sometimes affect speeds. No one can promise the same connection across the whole country — that goes for a local SIM and a travel eSIM alike.
Is there internet at Angkor? Main temples vs remote sites
At the main Angkor temples, mobile data usually works: Angkor Wat, Bayon, Ta Prohm and the Grand Circuit are close to Siem Reap and have signal. Sunrise at Angkor Wat draws hundreds of people to the pond, so the connection can slow down, but messages and photos usually get through.
The remote temples are a different story. Beng Mealea, Koh Ker and Phnom Kulen are an hour or more from town, the road runs through villages and forest, and the signal comes and goes along the way. Inside the forest ruins, coverage can be weak. For these trips, agree on a time and meeting spot in the parking lot with your driver in advance.
- Save your Angkor e-ticket as a screenshot: it’s checked at the temple entrances.
- Download an offline map of the Angkor area with the temples marked.
- Save your tuk-tuk driver’s number in your phone and on paper.
- Bring a power bank without fail: heat and navigation drain the battery fast.
Islands and jungle: Koh Rong, Mondulkiri, Ratanakiri
On Koh Rong and Koh Rong Samloem, there’s mobile signal around the main villages and piers, but on remote beaches and in the island’s jungle interior it’s weak or missing. Bungalows usually have Wi-Fi, but it’s slow and depends on the power supply, which on parts of the island runs on generator schedules.
Mondulkiri and Ratanakiri in the northeast are for travelers heading to waterfalls, villages and jungle treks. In the towns of Sen Monorom and Banlung there’s usually mobile data, but beyond them the signal disappears for long stretches.
Local SIM or eSIM in Cambodia?
For data on a trip around Cambodia, a travel eSIM is the easier choice, while a local SIM makes sense if you need a Cambodian number. As of October 2026, local SIM cards are sold at the Phnom Penh and Siem Reap airports, carrier stores and shops in town, and they’re only activated with your original passport: the TRC telecom regulator bans activating SIMs without ID. A Cambodian number is handy for a long winter stay, for local delivery apps and if your hosts call you by phone. Check the registration procedure before your trip.
A travel eSIM gets you online without queuing or swapping cards. With MoreSim, you buy a plan on the website or in the @moresim_bot Telegram bot, pay with Telegram Stars from any country, right in the bot (bank card and SBP payments currently work with cards issued in Russia), and the QR code arrives in the chat in about 30 seconds. The eSIM works as a second line, and your home SIM stays in the phone. MoreSim plans are mobile data only, with no phone number: you can call through messaging apps where they aren’t restricted, and bank texts keep coming to your home SIM.
Cambodia, Vietnam, Thailand, Laos: which plans do you need for the route?
For a trip around Indochina, each country needs its own plan: a Cambodia plan only works in Cambodia. Many travelers cross overland: from Thailand via Poipet, from Vietnam via Bavet or along the Mekong, from Laos via the northern border. At a land border you need data right away, to message your driver, check your route or show a booking.
| Route | eSIM option | What to watch for |
|---|---|---|
| Cambodia only | Cambodia plan | Enough data for the whole trip, top-ups in the bot |
| Cambodia plus one neighbor | One plan per country | Switch your data line at the border |
| Indochina: three or four countries | One plan per country, all installed at home | Label the lines so you don’t mix them up at the border |
It’s easiest to install every plan for the route at home in advance: a plan starts counting from its first connection to a network in its destination country, so the next profile doesn’t use up its validity while it waits for its border. For details on the neighbors, see our guides to Vietnam, Thailand and Laos.
How to get mobile data in Cambodia, step by step
Getting mobile data in Cambodia takes a couple of minutes after landing or crossing the border if you installed the eSIM at home.
- At home, check that your phone supports eSIM: the @moresim_bot bot has a compatibility check.
- Buy a Cambodia plan, install the profile over your home Wi-Fi and name the line “Cambodia”.
- After landing or crossing the border, turn off airplane mode.
- Select the Cambodia eSIM for cellular data and turn on data roaming for it: most travel eSIMs connect to a local carrier’s network as roaming SIMs, so without it you won’t get data.
- Turn off cellular data on your home SIM so your data doesn’t go through your home carrier; keep the line on if you’re expecting bank texts.
- If the network doesn’t appear within a couple of minutes, toggle airplane mode again.
How much data should I get for Cambodia?
How much data you need in Cambodia depends on your habits. Maps, tuk-tuk apps, translation and messaging use little. Your data goes on video, stories from the Angkor sunrise, video calls and automatic photo uploads to the cloud.
- A week covering Phnom Penh and Angkor with maps and messaging: 2–3 GB is usually enough.
- A winter stay or remote work: work out your usage with our data guide and leave some headroom.
- Set photo uploads and app updates to Wi-Fi only.
- If you run out before the plan expires, top up without a new eSIM: use “Top up data” on the eSIM card in your account or in the bot’s app, if top-ups are available for that plan.
Plan sizes and durations for Cambodia are shown on the country’s catalog page. If something doesn’t connect on arrival, MoreSim support is reachable via /support in the bot, a ticket in your account and email.
FAQ
Is there mobile data at Angkor Wat?
In Siem Reap and at the main Angkor temples — Angkor Wat, Bayon, Ta Prohm — there’s usually mobile signal. At remote temples like Beng Mealea and Koh Ker, in the forest and on dirt roads, the signal gets weaker. Save your Angkor e-ticket and your tuk-tuk driver’s contact offline before you set out.
How do I buy a SIM card in Cambodia?
Local SIM cards in Cambodia are sold at airports and in Smart, Cellcard and Metfone stores; as of October 2026, they’re only issued with your original passport. Check the registration procedure for foreigners before your trip. If you only need data, you can install a travel eSIM at home and switch it on right after landing.
Is there internet on Koh Rong?
On Koh Rong and Koh Rong Samloem, there’s mobile signal around the main villages and piers, but on remote beaches and in the jungle it’s weak or missing. Bungalow Wi-Fi is often slow. Save your accommodation booking, boat schedule and contacts offline.
Which plan should I get for Cambodia, Vietnam and Thailand?
A Cambodia plan only works in Cambodia, so for a trip around Indochina you install one plan per country. It’s easiest to set up all the profiles at home: each plan starts counting from its first connection to a network in its own country. At the border, you just switch your data line.
Do I need mobile data in Cambodia to get a tuk-tuk?
Yes, mobile data makes getting around Cambodia much easier: ride-hailing apps let you book tuk-tuks and taxis with the price shown up front, so you don’t have to explain the address to the driver. These apps run on mobile data, so an eSIM or local SIM comes in handy from day one.
How much data do I need for two weeks in Cambodia?
It depends on your habits: maps, tuk-tuk apps and messaging use little, while video, stories from Angkor and automatic photo uploads burn through a plan fast. Estimate your scenario with our data guide and leave some headroom: a MoreSim plan can be topped up in the bot without a new eSIM.