Best eSIM for Cambodia 2026: Angkor Wat, Siem Reap & Phnom Penh 4G/5G Compared
Cambodia runs three carriers — Smart (Axiata), Cellcard, and Metfone. Smart is strongest around Angkor Wat and Siem Reap; Metfone has widest rural reach. A travel eSIM routes through the same networks and skips the airport-SIM-counter queue entirely.
Published August 4, 2026·Updated August 20, 2026·6 min read
30-day auto-refund on no usageSummary
Fast answer: For 2026 travel in Cambodia, a travel eSIM installed before you fly is the simplest option — travel eSIMs route through Smart or Metfone (the two best-coverage local carriers), YonoSIM rides Metfone, and either way you skip the airport SIM counter queue. A 3–5 GB plan runs about US$6–13. The Angkor Wat archaeological zone has solid 4G on Smart and Cellcard; expect no 5G outside central Phnom Penh in 2026. If you're also visiting Vietnam or Thailand, one Southeast Asia regional plan covers everything.
Carrier coverage: Smart vs Cellcard vs Metfone
Cambodia has three mobile carriers competing for tourist traffic:
- Smart (Axiata) — Largest subscriber base and strongest coverage around the Angkor archaeological zone (Siem Reap). Solid 4G nationwide, 5G in central Phnom Penh only.
- Cellcard (owned by Royal Group) — Strong in Phnom Penh; good at Angkor. Sells a "Tourist SIM" at the airport for US$10 for 7 days with 8 GB.
- Metfone (Vietnamese Viettel subsidiary) — Widest rural reach: coastal Sihanoukville, Kampot/Kep, Cardamom mountains, Mondulkiri, Ratanakiri. First choice if you're going off the beaten path.
Travel eSIMs commonly route through Smart or Metfone — which happens to be the correct choice for the two most common trip shapes (Angkor temples + Phnom Penh, or an off-grid coastal/mountain add-on). YonoSIM's Cambodia plans ride Metfone.
Angkor Wat, Siem Reap, and the temples
The main Angkor archaeological park sits north of Siem Reap. Coverage inside the park is consistently good 4G on Smart and Cellcard — you can look up temple history in Google, check tuk-tuk routing on Grab, and send photos to family without issue. Sunrise at Angkor Wat (5:30–6 AM) is the busiest time and you'll notice the network slow slightly as ~10,000 phones hit the same towers, but connections stay usable.
Outlying temples get patchier. Banteay Srei (30 km north-east) has fine coverage. Beng Mealea and Koh Ker (60+ km east) are inconsistent — Smart is usually the safest bet, but plan to cache Google Maps offline before you leave the hotel. If you're doing the full Angkor Thom day trip with the "big loop" and remote temples, a travel eSIM plus offline maps is the pragmatic combination.
Cambodia eSIM 2026: who wins on what
Five brands, the same five questions, in every country guide we publish. Coverage figures are each brand’s own published network list; price and plan figures come from esimDB, checked 20 August 2026.
| Category | Winner | Runner-up | On what basis |
|---|---|---|---|
| Widest coverage | YonoSIM & Airalo | — | both publish 1 network |
| Cheapest per GB | Airalo | YonoSIM | $0.89/GB vs $1.54 — at 100 GB / $89 / 180 days |
| Widest plan range | Saily | YonoSIM & Airalo & Nomad | 9 distinct data sizes vs 8 |
| Publishes its network | YonoSIM & Airalo | — | Nomad, Saily, Holafly name no carrier |
| Brand | Networks in Cambodia | Best $/GB | Plans | Sizes |
|---|---|---|---|---|
| YonoSIM | Metfone (4G) | $1.54 | 41 | 8 |
| Airalo | Smart | $0.89 | 53 | 8 |
| Nomad | Not disclosed | $1.80 | 20 | 8 |
| Saily | Not disclosed | $1.96 | 26 | 9 |
| Holafly | Not disclosed | — | — | — |
Networks are each brand's own published figure. Prices, plan counts, and data sizes via esimDB, checked 20 August 2026. Holafly publishes neither a per-country carrier nor plans on esimDB, so it cannot be scored on price or range here. Plan range is counted in distinct data sizes, not plan count.
Which one to pick
- Coverage: YonoSIM and Airalo publish the same number of networks here (1); ours are Metfone (4G).
- Cheapest data is Airalo at $0.89/GB — YonoSIM is $1.54. If price is the only thing you are optimising, buy theirs.
- Want an unusual data size? Saily offers the most granular ladder (9 distinct sizes).
- Want the data back if you don’t use it? YonoSIM refunds unused data automatically after 30 days; the others require you to ask. Check each brand’s current terms before you buy.
eSIM vs airport SIM vs roaming
| Option | Typical cost (1 week) | Setup time | Angkor coverage |
|---|---|---|---|
| Travel eSIM | US$3–15 (3–10 GB) | 5 min pre-flight on hotel Wi-Fi | Metfone (YonoSIM) — strong |
| Airport SIM (Smart/Cellcard) | US$10–20 (7–15 days) | 15–30 min queue + passport | Same carrier — strong |
| Home carrier roaming (US/EU) | US$10–15 per day | Auto-active | Depends on partner carrier |
| Pocket Wi-Fi rental | US$30–60/week + deposit | Airport pickup | Fine but another device to charge |
| Plan | Price | Network | Speed | After daily allowance | IP breakout |
|---|---|---|---|---|---|
| Unlimited · 500 MB/day at full speed · Flexible 1–365 days | US$2.99 | Metfone / Cellcard | 4G | 512 Kbps | SG |
| 3.0 GB · 15 days | US$4.99 | Metfone / Cellcard | 4G | — | SG |
| 3.0 GB · 30 days | US$4.99 | Metfone / Cellcard | 4G | — | SG |
Hotspot and tethering are allowed on every plan we sell. Plans are data-only unless the plan page states otherwise — only selected plans carry calls or SMS. IP breakout is where your traffic exits the network, which is not always the country you are visiting. Prices and networks are read from the same catalogue that powers our machine-readable pricing file, so this table cannot go stale against checkout.
Practical trip checklist
- Visa: US/UK/EU/AU passports get an e-Visa (US$30) via evisa.gov.kh — apply 3+ days before travel. Visa-on-arrival is also available but the e-Visa skips a queue.
- Cash currency: USD is the de-facto currency for tourists. Riel (KHR) is used as small change under $1. ATMs dispense USD.
- Grab (not Uber) is the ride-share app in Phnom Penh and Siem Reap. PassApp is the local competitor. Both need working data — another reason to install eSIM before landing.
- Angkor pass: Buy the 1-day (US$37), 3-day (US$62), or 7-day (US$72) pass at the official ticket office 4 km outside Siem Reap. Passports required. The 3-day pass is the sweet spot for most travelers.
- Sunrise at Angkor Wat: Leave your hotel by 4:45 AM. Grab drivers know the drill. Bring a small torch and water.
- Power plugs: Types A, C, and G all appear. A universal adapter is safest.
Frequently asked questions
QWhich Cambodian carrier has the best coverage for tourists?
ASmart for Siem Reap and Angkor; Metfone for rural add-ons. Cellcard is a fine third in Phnom Penh. Travel eSIMs typically route through Smart or Metfone; YonoSIM rides Metfone.
QCan I buy a Cambodian carrier eSIM as a tourist at the airport?
AYes but with a queue. Smart and Cellcard have counters at Phnom Penh and Siem Reap airports (US$10–20 for 7–15 days). Passport required. A travel eSIM installed pre-flight skips the counter, at about US$6–13 for 3–5 GB.
QWill 4G/5G work at Angkor Wat and remote temples?
ASolid 4G at the main Angkor complex; patchy at remote temples. Angkor Wat, Bayon, Ta Prohm all work fine on Smart and Cellcard. Beng Mealea and Koh Ker are inconsistent — Smart is the safest bet, plus cache offline maps. No consumer 5G in the Angkor zone in 2026; 5G exists only in central Phnom Penh.
QIs one eSIM enough for a Cambodia + Vietnam or Cambodia + Thailand trip?
AYes — pick a Southeast Asia regional plan. One eSIM covers Cambodia + Vietnam + Thailand + Laos + Malaysia, ideal for the Bangkok–Siem Reap–Phnom Penh–Ho Chi Minh backpacker circuit. Cambodia-only is cheaper if you're staying put.
Related guides
- Best eSIM for Vietnam 2026
- Best eSIM for Thailand 2026
- Best eSIM for Laos 2026
- Best travel eSIM according to Reddit 2026
Originally published on www.yonosim.com/en/blog/best-esim-cambodia-2026 · YonoSIM — You Only Need One SIM