Cambodia eSIM: Stay Online from Angkor Wat to Phnom Penh
Land in Cambodia already connected. A travel eSIM gives you instant 4G/5G data the moment you arrive, no roaming bills and no hunting for a SIM kiosk.
Touch down at Siem Reap or Phnom Penh and your phone is already online, ready to call a tuk-tuk, map your way to Angkor Wat, or message home. That is the magic of a travel eSIM for Cambodia.
Why use an eSIM in Cambodia
A local SIM means queuing at the airport, showing your passport, and swapping out your home card. An eSIM skips all of that. You buy it before you fly, scan a QR code, and switch it on the second you land.
Cambodia has strong, modern mobile networks. The main operators are Smart, Cellcard, and Metfone, and our eSIM connects to the best available signal automatically.
4G is fast and widespread in cities and tourist hubs
5G is live in Phnom Penh and growing in Siem Reap
Reliable coverage in Sihanoukville and along the coast
Rural and temple areas have solid 4G, though remote jungle spots can be patchy
How to get connected
1. Buy your Cambodia eSIM online and receive the QR code by email
2. Scan the QR in your phone settings to install the data plan
3. Enable the eSIM and turn on data roaming for that line when you arrive
That is it. Most travellers are online before they leave the airport.
How much data do you need
Light (maps, chat, email): 1 GB per week
Medium (social media, browsing, some video): 3 to 5 GB
Heavy (streaming, hotspot, video calls): 10 GB or more
Wi-Fi is common in hotels and cafes, so many travellers do well with a mid-size plan.
Currency: Cambodian riel (KHR); US dollars are widely accepted
Capital: Phnom Penh
Language: Khmer
Time zone: Indochina Time (UTC+7)
Must-see: Angkor Wat, the Royal Palace in Phnom Penh, and the beaches of Koh Rong
FAQ
Is my phone compatible?
Most phones from the last few years support eSIM, including recent iPhone, Samsung Galaxy, and Google Pixel models. Check your settings for an eSIM or add-data-plan option.
When should I install it?
Install at home over Wi-Fi before you fly, then simply switch it on when you land. You can set the activation to begin on arrival.
Can I keep my WhatsApp number?
Yes. WhatsApp is tied to your original number, which stays active. The eSIM only carries data, so your account and chats work exactly as before.
Yes. HelloSIM offers a Cambodia eSIM that connects to major local networks, giving you mobile data across Phnom Penh, Siem Reap, Sihanoukville and most populated areas as soon as you arrive.
Is my phone compatible with a Cambodia eSIM?
Most phones from the last few years support eSIM, including iPhone XS and newer, Google Pixel 3 and newer, and recent Samsung Galaxy S, Note and Z models. Your phone must also be carrier-unlocked.
How do I check if my phone supports eSIM before travelling to Cambodia?
On iPhone, dial *#06# and look for an EID number, or check Settings, Cellular, Add eSIM. On Android, look under Settings, Network and internet, SIMs for an 'Add eSIM' option.
How do I buy and install a HelloSIM eSIM for Cambodia?
Order the Cambodia plan on the HelloSIM website or app, then you'll receive a QR code by email. Scan it in your phone's settings to install the eSIM before you fly.
How do I install the eSIM QR code on an iPhone?
Go to Settings, Cellular, Add eSIM, Use QR Code, then point the camera at the HelloSIM code. Follow the prompts to label the line and choose it for data.
How do I install the eSIM on an Android phone?
Open Settings, Network and internet, tap the plus next to SIMs or 'Add eSIM', choose to scan a QR code, and scan the code HelloSIM emailed you. Steps vary slightly by brand.
Which networks does HelloSIM use in Cambodia?
HelloSIM roams on leading Cambodian operators such as Cellcard, Smart Axiata and Metfone, so your device connects to whichever partner network has the strongest signal in your location.
Is there 4G and 5G coverage in Cambodia?
4G LTE is widely available across cities and most towns. 5G is being rolled out in Phnom Penh and Siem Reap, so speeds vary by area and device.
How much data do I need for a week in Cambodia?
For a week of maps, messaging, social media and light browsing, most travellers do well with around 3 to 5 GB. Add more if you stream video or tether other devices.
How much data should I get for two weeks in Cambodia?
A two-week trip with regular navigation, photos and social sharing usually fits in roughly 8 to 12 GB. Heavy video or hotspot users should size up.
How much does a Cambodia eSIM cost?
Prices depend on the data amount and validity you choose. HelloSIM offers a range of plans, so smaller data bundles cost less and larger or longer plans cost more. Check the live price on the plan page.
How long is a Cambodia eSIM valid?
Validity depends on the plan, typically running from a few days up to about 30 days. The countdown starts when your eSIM connects to a network in Cambodia.
Can I use my HelloSIM eSIM as a hotspot in Cambodia?
Yes, HelloSIM eSIMs support tethering, so you can share your connection with a laptop or tablet. Remember hotspot use consumes your data allowance faster.
Can I keep my home phone number while using the eSIM in Cambodia?
Yes. The eSIM runs alongside your physical SIM in dual-SIM mode, so you keep your home number for calls and texts while using the eSIM for data.
Should I turn off my home SIM to avoid roaming charges in Cambodia?
Yes, set the HelloSIM eSIM as your data line and switch data roaming off on your home SIM to avoid surprise charges from your regular carrier.
When should I activate my Cambodia eSIM, before or after arrival?
Install the eSIM before you fly, but it usually activates when it first connects to a Cambodian network. That way you're online the moment you land.
Will I have internet at Phnom Penh airport when I land?
Yes, if your eSIM is installed and set to connect on arrival, it should register on a local network shortly after landing at Phnom Penh or Siem Reap airport.
Do I need to change APN settings for my Cambodia eSIM?
Usually the APN configures automatically. If you have no data after connecting, HelloSIM provides the correct APN to enter manually under your cellular data settings.
My eSIM shows no service in Cambodia, what should I do?
Make sure data roaming is on for the eSIM line, toggle airplane mode off and on, or restart the phone. If it still fails, manually select a network in settings.
The eSIM is not registering on a network in Cambodia, how do I fix it?
Go to your cellular settings, turn off automatic network selection, and manually choose a partner operator like Smart or Cellcard. Reboot afterwards if needed.
Can I make phone calls and send SMS with the Cambodia eSIM?
HelloSIM plans are data-only, so they don't include a local number for regular calls or texts. Use apps like WhatsApp, Telegram or FaceTime for calls over data.
How do I top up or add more data if I run out in Cambodia?
You can buy more data through your HelloSIM account or app without swapping the eSIM. Top up before you fully run out to stay connected.
What happens when my Cambodia eSIM data runs out?
Your connection stops once the allowance is used or the plan expires. You simply purchase a new plan or top-up in the HelloSIM app to keep going.
Can I use my Cambodia eSIM in nearby countries like Thailand or Vietnam?
A single-country Cambodia plan only works in Cambodia. For multi-country trips, HelloSIM also offers regional Asia plans that cover several neighbouring countries.
Is there an Asia regional eSIM that includes Cambodia?
Yes, HelloSIM offers regional plans covering multiple Asian countries. If you're also visiting Thailand, Vietnam or Laos, a regional plan can be more convenient than separate SIMs.
What are typical mobile data speeds in Cambodia?
In cities you can often expect solid 4G speeds suitable for maps, streaming and video calls. Speeds drop in rural areas and along remote roads where coverage is thinner.
Is there good coverage at Angkor Wat and Siem Reap?
Siem Reap town has strong 4G, and the Angkor temple complex generally has usable coverage, though signal can weaken deep inside larger temples or forested areas.
What is the emergency number in Cambodia?
In Cambodia, dial 117 for police, 119 for medical or ambulance, and 118 for fire. Emergency calls can be made even without an active data plan.
Can I use the eSIM on the islands like Koh Rong?
Coverage reaches popular islands such as Koh Rong and Koh Rong Samloem near Sihanoukville, but signal can be patchy or slower, especially away from the main beaches.
Do I need to give my passport to buy a Cambodia eSIM?
No. Unlike buying a physical local SIM in Cambodia, HelloSIM eSIMs need no passport registration or SIM card shop visit. You buy online in a few minutes.
Can I install the Cambodia eSIM but activate it later?
Yes. Many HelloSIM plans let you install the eSIM in advance while the validity period only begins once you connect to a network in Cambodia. Check your plan's terms.
Will the eSIM work on a second phone if I switch devices?
An eSIM is tied to the device it was installed on and generally can't be moved. Install it on the phone you plan to use throughout your Cambodia trip.
Can I get a refund on my Cambodia eSIM?
If an eSIM is unused and hasn't been activated, HelloSIM can typically help with refunds or exchanges. Contact support before installing if you bought the wrong plan.
Do I need Wi-Fi to install the eSIM for Cambodia?
Yes, you need an internet connection to scan and install the QR code, so set it up on home Wi-Fi before you leave rather than relying on airport Wi-Fi.
Is using an eSIM in Cambodia better than airport SIM cards or pocket Wi-Fi?
An eSIM saves you queuing at kiosks, avoids passport registration, and doesn't require carrying an extra device or swapping a tiny card, so you're connected instantly on arrival.
Can I use ride-hailing and delivery apps in Cambodia with the eSIM?
Yes, apps like Grab and PassApp work fine over your eSIM data, which is handy for getting around Phnom Penh and Siem Reap without haggling over fares.
Should I download offline maps before my Cambodia trip?
Yes, saving offline Google Maps of Phnom Penh, Siem Reap and Angkor is smart, so you can navigate even in spots with weak signal and save some data.
Does the eSIM work during long-distance bus rides in Cambodia?
Along major routes like Phnom Penh to Siem Reap you'll have coverage most of the way, though expect occasional dead zones through rural stretches between towns.
How many devices can I connect to my Cambodia eSIM hotspot?
You can typically tether several devices at once, subject to your phone's hotspot limits. Keep in mind that every connected device shares the same data allowance.
What should I do with the eSIM after my Cambodia trip ends?
Once the plan expires you can simply delete the eSIM from your phone's settings. Removing it frees up an eSIM slot for your next destination.
