Best eSIM for Cambodia in 2026: Tested and Compared

HOLASIM is the best overall eSIM for Cambodia in 2026, offering global coverage in 200+ destinations, including unlimited data plans, a never-expiring eSIM, and 24/7 human support in multiple languages, all starting from an affordable ~USD 1.70.

Cambodia changed materially at the start of this year. At one minute past midnight on 1 January 2026, all three national operators — Smart Axiata, Metfone (Viettel) and Cellcard — switched on commercial 5G simultaneously in a rollout coordinated by the Ministry of Post and Telecommunications. Fifteen provinces went live in the first phase, including Phnom Penh, Siem Reap and Preah Sihanouk. By mid-2026 Smart reported around 750 5G sites across 21 provinces, Metfone around 531 base stations and Cellcard roughly 500, targeting more than 1,000 by the end of July. Any guide still telling you Cambodian 5G is "in trials" is out of date.

That said, 5G in Cambodia is urban-clustered and, for a traveller, largely irrelevant. Metfone claims coverage of more than 95% of the country including remote and rural areas, Smart claims nearly 99% of the population across all 25 provinces, and Cellcard over 90%. Urban 4G runs comfortably in the 30 to 50 Mbps range, which is more than enough for maps, messaging and video calls. What actually matters is where coverage thins: guides consistently warn that signal degrades in remote areas and in the temple zones around Angkor Wat, and no operator publishes usable data for the Koh Rong islands.

The other thing to understand about Cambodia is price. Travel eSIMs here are expensive relative to neighbouring markets. At the 10 GB tier, the same provider will typically charge you roughly twice what it charges in Thailand — Airalo is about USD 21 for 10 GB in Cambodia against USD 10 in Thailand, Saily about USD 24 against USD 11, Nomad USD 24 against USD 12. Entry-level 1 GB has converged to parity at around USD 4, but the premium bites hard from 3 GB upward. Keep that in mind while reading everything below.

The best eSIM for Cambodia in 2026

Best overall: HOLASIM

Price: from ~USD 1.70 · Unlimited: Yes · Devices: iOS/Android

Reasons to buy:

• Coverage across 200+ destinations, which matters in Southeast Asia where almost nobody visits Cambodia alone
• The eSIM never expires — install it once and recharge before each trip, rather than buying a new profile per country
• Unlimited data plans available alongside fixed-data bundles
• 24/7 support staffed by real people in English, Spanish and Portuguese
• Instant QR activation, entry pricing from approximately USD 1.70

Reasons to avoid:

• Unlimited plans cost more than equivalent fixed-data bundles
• A local Smart or Metfone SIM bought at the airport will be dramatically cheaper per gigabyte

Cambodia is almost always part of a longer trip — Bangkok in, Siem Reap and Phnom Penh in the middle, Ho Chi Minh City or Vientiane out. That itinerary is exactly where a per-country eSIM model falls apart: three profiles, three expiry dates, three installs, and a support ticket somewhere in the middle of it. HOLASIM's permanent, rechargeable profile removes that friction entirely, and the 24/7 human support in your own language is worth more in Cambodia than in most places, because if the profile does not attach at Siem Reap arrivals you have no fallback and limited English signage. The honest trade-off is the same as everywhere: unlimited costs more than a fixed bucket, so buy the bucket if you know your usage.

Cheapest of the big brands: Airalo

Price: from ~USD 4.00 · Unlimited: Yes · Devices: iOS/Android

Reasons to buy:

• The lowest headline prices among the majors: about USD 4 for 1 GB over 3 days, USD 12 for 5 GB over 7 days, USD 21 for 10 GB over 30 days and USD 32 for 20 GB
• Unlimited plans available on the Cambodia pack from roughly USD 12.50 for 3 days to USD 72.50 for 30 days
• Roams on Smart, the strongest network in Phnom Penh and Siem Reap city
• Polished app rated around 4.6–4.7 on both stores, plus 24/7 in-app chat, email and WhatsApp

Reasons to avoid:

• The lowest Trustpilot rating of the major brands, currently around 4.0 — down from the 4.7 quoted in older roundups
• Unlimited is throttled to 1 Mbps after 3 GB per day
• Support is English-first with no dedicated multilingual desk

Airalo is the value pick if you want a single-country pack and a known brand. Its Asialink regional plan is also worth a look if you are hopping between Thailand, Vietnam and Cambodia: roughly USD 25 for 10 GB across eight countries, or USD 89 for 100 GB over 180 days. The regional pack rarely beats the country pack on pure price, but it beats buying three separate ones.

Best for unlimited data: Holafly

Price: from ~USD 12.50 (3 days) · Unlimited: Yes · Devices: iOS/Android

Reasons to buy:

• Unlimited data on every plan, from 3 to 30 days and beyond
• Roams on Metfone, the operator with the strongest rural and remote footprint — the right choice for the Angkor temple circuit and the northeast
• 24/7 live chat plus WhatsApp, and a Trustpilot score around 4.7
• Includes "Always On" backup data of 1 GB per month across 150+ countries

Reasons to avoid:

• Hotspot sharing is capped at roughly 1 GB per day, which rules it out as a laptop connection
• Expensive: around USD 27.50 for 7 days and USD 73.90 for 30 days
• Prices shift noticeably between currencies and promotions, so check the total at checkout

If your Cambodia plan is heavy on Angkor, Preah Vihear or the Cardamoms, Metfone access is the single most useful thing you can buy, and Holafly is the easiest way to get it without thinking about allowances. Just do not plan to work off it.

Best for heavy data: Ubigi

Price: from ~USD 5.00 · Unlimited: Capped-then-throttled · Devices: iOS/Android

Reasons to buy:

• The best price per gigabyte at the top of the market: around USD 39 for 25 GB over 30 days and USD 68 for 60 GB plus throttled data
• Runs on Metfone with 5G on all plans, and data sharing is explicitly permitted
• Install-once, recharge-forever model, backed by NTT, with SmartStart auto-activation on arrival

Reasons to avoid:

• The "unlimited" plans are a large bucket followed by a 2 Mbps throttle, not true unlimited
• Data-only with no number or SMS, and no published 24/7 support commitment
• Trustpilot around 4.1, and Ubigi's own site quotes a materially higher figure than the live page shows

Best hotspot policy: Saily

Price: from ~USD 5.99 · Unlimited: No Cambodia plan · Devices: iOS/Android

Reasons to buy:

• Explicitly no hotspot restrictions — the clearest tethering policy in the category
• Multi-carrier access across Smart Axiata and Metfone, which is unusual at this price
• Trustpilot around 4.7 from more than 25,000 reviews, and a Play Store rating of 4.6 from nearly 94,000 reviews
• Ad blocking, web protection and 3% credit back, courtesy of the Nord Security stack

Reasons to avoid:

• No unlimited option for Cambodia, and the catalogue tops out at 10 GB for around USD 24
• Chat support is not truly 24/7, with responses typically inside two hours
• Cambodia pricing is roughly double Saily's Thailand pricing for the same allowance

Best simple mid-tier plan: Nomad

Price: from ~USD 6.00 · Unlimited: No Cambodia plan · Devices: iOS/Android

Reasons to buy:

• Clean ladder of plans up to 20 GB over 45 days for about USD 36 — the longest validity window here
• Runs on Metfone with 4G and 5G, hotspot permitted, add-on top-ups supported
• Free 1 GB trial eSIM for new users, and a generous 60-day activation window

Reasons to avoid:

• Ticket-based support with no live chat, the weakest model in this group
• No unlimited Cambodia plan
• Trustpilot around 4.3

Cambodia eSIM comparison

Provider	From	10 GB	Unlimited	Network	5G	Hotspot
HOLASIM	~USD 1.70	Recharge model	Yes	Multi-network	Yes	Yes
Airalo	~USD 4.00	~USD 21 / 30 days	~USD 29.50 / 7 days	Smart	Yes	Yes
Holafly	~USD 12.50	Unlimited only	~USD 27.50 / 7 days	Metfone	Yes	~1 GB/day cap
Ubigi	~USD 5.00	~USD 20 / 30 days	60 GB then 2 Mbps	Metfone	Yes	Yes
Saily	~USD 5.99	~USD 23.99 / 30 days	No	Smart + Metfone	Yes	Unrestricted
Nomad	~USD 6.00	~USD 24 / 30 days	No	Metfone	Yes	Yes

How to choose

Decide first where you are going within Cambodia. If your trip is Phnom Penh and Siem Reap city, Smart gives the best speeds and Airalo is the cheapest way onto it. If you are spending real time at the temples, heading to Preah Vihear, Kratie or Mondulkiri, or island-hopping to Koh Rong, choose a Metfone-based provider — Holafly, Ubigi or Nomad — or a multi-network provider like HOLASIM or Saily.

Then decide whether you need tethering. This is the cleanest dividing line in the Cambodian market. Saily and Ubigi allow it without meaningful restriction, Airalo and Nomad permit it, and Holafly caps it at roughly 1 GB per day. If you are working from a laptop in a Siem Reap café, that cap will end your day.

Finally, be honest about the local alternative, because in Cambodia it is genuinely strong. A Smart Traveler SIM bought at Phnom Penh or Siem Reap airport runs about USD 5 for 30 GB over 15 days with local minutes and SMS included. Metfone airport packages start around USD 5 for 40 GB and run to about USD 12 for 100 GB. Cellcard sells roughly 5 GB per day for seven days for about USD 6. Against Airalo's USD 21 for 10 GB, the local SIM is offering something in the order of ten times more data per dollar, plus a Cambodian phone number.

Two caveats keep the eSIM case alive. First, local SIMs require passport registration, and Cambodian enforcement is tightening sharply: after a June 2026 fraud case the Telecommunication Regulator opened action against operators for failed ID verification, roughly five million of the country's thirteen million mobile users hold SIMs registered under someone else's name, and the ministry committed to eliminating improperly registered SIMs by August 2026. Expect slower, stricter counter service. Second, USD is a de facto co-currency in Cambodia, so the usual "no local cash on arrival" argument does not apply here — you can pay a kiosk in dollars. That makes the local SIM easier than in most countries, and the eSIM case narrower: speed, no queue, no passport photocopy, one profile across your whole trip, and support in your language.

How to install an eSIM in Cambodia

1. Check your phone is eSIM-capable and carrier-unlocked: iPhone XS/XR or newer, Pixel 3 or newer, Galaxy S20 or newer, or most 2021-and-later flagships.
2. Buy and install before you fly, on reliable Wi-Fi. The QR code arrives by email within minutes of purchase.
3. Install the profile: on iOS, Settings → Cellular → Add eSIM; on Android, Network & Internet → SIMs → Add eSIM.
4. Label it clearly — "Cambodia trip" — so it is obvious which line is which.
5. Turn data roaming ON for the travel eSIM and OFF for your home SIM before the plane doors open.
6. Set the travel eSIM as the default for mobile data, keeping your home number active for SMS two-factor codes.
7. On landing at Phnom Penh or Siem Reap, allow one to two minutes for attachment. If nothing appears, toggle airplane mode, then manually select Smart, Metfone or Cellcard in network selection.

Coverage and networks in Cambodia

Metfone, owned by Viettel, is the market leader with around ten million subscribers and the broadest rural reach — it claims more than 95% of the country, including remote areas. Smart Axiata claims close to 99% population coverage across all 25 provinces and consistently delivers the fastest urban speeds, which makes it the best network for Phnom Penh and Siem Reap city. Cellcard, the only fully Cambodian-owned operator, covers over 90% of the country and has concentrated its 5G build in Phnom Penh, including Techo International Airport.

For temples and countryside, Metfone is the safe default. Expect coverage to degrade inside the Angkor archaeological park, where guides consistently report weaker signal, and treat the Koh Rong islands as unknown territory — no operator publishes coverage data there and reports vary. Download offline maps for Angkor before you go, whichever eSIM you buy.

FAQ

Does Cambodia have 5G in 2026?

Yes. All three operators launched commercial 5G simultaneously on 1 January 2026 across fifteen provinces, including Phnom Penh, Siem Reap and Preah Sihanouk. By mid-2026 the three had roughly 1,700 to 1,800 combined sites. For travel purposes 4G is still entirely sufficient, and coverage matters far more than technology.

Which Cambodian network is best for Angkor Wat?

Metfone. Signal degrades noticeably inside the temple zones and Metfone has the strongest rural footprint. Holafly, Ubigi and Nomad all roam on Metfone; HOLASIM and Saily give multi-network access.

Is a local SIM cheaper than an eSIM in Cambodia?

Substantially. A Smart Traveler SIM at the airport is around USD 5 for 30 GB over 15 days with minutes and SMS, against roughly USD 21 for 10 GB from Airalo. The trade-offs are passport registration, a counter queue, and — given the 2026 registration crackdown — slower processing.

Why is Cambodia more expensive than Thailand for eSIMs?

Wholesale roaming rates. Cambodia has a smaller market and less competitive wholesale pricing than Thailand or Vietnam, so the same provider charges roughly double at the 10 GB tier. The gap closes at 1 GB, where both markets sit around USD 4.

Can I tether a laptop off a Cambodian eSIM?

Yes with most providers. Saily states no hotspot restrictions, Ubigi permits data sharing explicitly, and Airalo and Nomad allow tethering. Holafly caps hotspot use at roughly 1 GB per day, which makes it unsuitable for laptop work.

Do I need to register my passport for a travel eSIM in Cambodia?

No. Travel eSIMs are data-only services provided from outside Cambodia and sit outside the local SIM registration regime. Only physical local SIMs require passport registration — a requirement that is being enforced far more strictly through 2026.