Getting connected in Cambodia is cheap and easy once you know which of the country’s three carriers to pick and where to buy from — but it’s also one of the few things in Cambodia where a slightly wrong choice (the wrong airport counter, the wrong “tourist” package) can cost you more than it should. Here’s a practical, no-nonsense breakdown of your actual options.
Cambodia’s Three Mobile Carriers
- Smart (Smart Axiata): Generally considered the largest network with the best all-around coverage, including a growing 5G footprint in Phnom Penh and Siem Reap. A safe default if you’re not sure which to pick.
- Cellcard: Strong in cities, with the most visible shopfronts and top-up points — you’ll see Cellcard signage everywhere, which makes topping up simple wherever you are.
- Metfone: Often the strongest option specifically in rural areas and smaller towns, so it’s worth considering if your trip goes beyond Phnom Penh and Siem Reap into the provinces.
Buying a Physical SIM Card
You’ll need your passport to register, and the process at an official store takes about ten minutes. Here’s the honest comparison of where to buy:
- Airport SIM counters: Convenient right after you land, but treat them with some caution — recent traveler reports describe Phnom Penh airport SIM booths selling “tourist” packages at inflated prices or not matching what was advertised. If you can wait until you’re in the city, you’ll generally get a fairer price.
- Official carrier stores (Phnom Penh, Siem Reap): The most reliable option — clear pricing, and staff who can actually help if something doesn’t activate properly or you need a replacement SIM later in your trip.
- Small phone shops and minimarkets: Often the cheapest and fastest option, but plans may be explained poorly, so confirm exactly what data, call, and text allowance you’re getting before you pay.
As a rough price sense (these move with promotions, so treat them as a planning range, not a quote): a basic Cellcard SIM card itself runs around $1, with data packages commonly landing somewhere between $4–$8 for 20–40GB over 28–30 days across all three carriers. Skip any package specifically marketed as a “tourist SIM” if the price looks high relative to a standard local package — it’s usually the same SIM with a markup.
eSIM Options
This is the one place where Cambodia’s own carriers haven’t clearly caught up: none of Smart, Cellcard, or Metfone are confirmed to sell eSIMs directly to tourists at the time of writing, with eSIM activation only mentioned as available “where supported” at some official stores. In practice, most visitors who want an eSIM for Cambodia use a third-party provider instead — Airalo, aloSIM, Nomad, and eSIMPal are commonly used, with Airalo running on the Smart network and most of the others on Metfone (eSIMPal can use either, which gives it the widest effective coverage).
The trade-off to know about before you buy: these travel eSIMs are data-only — no Cambodian phone number, so no local calls or SMS. If you need to call a Cambodian number (a hotel, a tour guide, a tuk-tuk driver), you’ll either need a local number via a physical SIM, or a workaround like WhatsApp or a call-forwarding app, which won’t always reach a number that only takes regular calls. If you expect to make local calls at all, a cheap physical Cellcard or Smart SIM is the more complete solution; if you just need data for maps and messaging apps, a travel eSIM bought before you land is the more convenient one.
Our Recommendation
For most visitors: buy a physical SIM once you’re in the city (not at the airport), from an official Smart or Cellcard store if you want someone to turn to if anything goes wrong, or a budget phone shop if you’re comfortable confirming the package yourself. Bring your passport. If you specifically want to avoid dealing with a physical SIM at all and don’t need a local number, a data-only eSIM from Airalo or eSIMPal bought in advance is a reasonable alternative — just plan around the no-phone-number limitation.
For the rest of your pre-trip prep, see our Cambodia visa guide, Cambodia packing list, and Cambodia safety guide.
Cambodia SIM Cards and eSIM: FAQ
Which Cambodian SIM carrier is best for tourists?
Smart (Smart Axiata) is generally the safest default for all-around coverage, including the capital and Siem Reap. Metfone is worth considering if you’re heading into rural provinces, where it often performs better than the other two.
Can I buy an eSIM from a Cambodian carrier?
Not reliably as a tourist — local carrier eSIM support isn’t clearly offered at the time of writing. Most visitors who want an eSIM use a third-party provider like Airalo, aloSIM, or eSIMPal instead, which activates on the Smart or Metfone network depending on the provider.
Should I buy my SIM at the airport?
It’s generally better not to. Airport SIM counters are convenient but have had recent reports of overpriced or misrepresented “tourist” packages. Waiting until you reach an official carrier store or a reputable phone shop in the city usually gets you a fairer price.
Do I need my passport to buy a Cambodian SIM?
Yes — registration with ID is standard practice, and the activation process at an official store takes about ten minutes.
Does a Cambodian eSIM include a phone number?
No — travel eSIMs are data-only. If you need to make or receive local calls, you’ll need a physical SIM with a Cambodian number instead.