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Phnom Penh eSIM

17 Cambodia plans · from $25.88

Phnom Penh sits at the confluence of the Mekong and the Tonlé Sap, and it is where most Cambodia trips begin before the road or flight north to Angkor. A travel eSIM covers the capital, Siem Reap and the southern coast on one plan, and it handles the arrival — which is the part that has changed recently.

Landing at Phnom Penh & Techo International (PNH / KTI)

The capital's new Techo International airport opened south of the city and sits considerably further out than the old one. Allow more transfer time than older guides suggest and check the airport code on your ticket — Grab and PassApp both operate for the ride in.

eSIM plans that cover Phnom Penh

Phnom Penh is covered by every Cambodia plan below — there is no separate city-only eSIM to buy.

Choose a data plan

★ BEST VALUE

Unlimited

1 days· ∞ GB per $1

$25.88

1 GB

7 days· 0.0 GB per $1

$26.41

2 GB

15 days· 0.0 GB per $1

$51.20

3 GB

30 days· 0.0 GB per $1

$71.77

Unlimited

3 days· ∞ GB per $1

$75.19

5 GB

30 days· 0.0 GB per $1

$118.55

Unlimited

5 days· ∞ GB per $1

$124.49

Unlimited

7 days· ∞ GB per $1

$173.80

10 GB

30 days· 0.1 GB per $1

$217.80

Which networks you'll be on in Phnom Penh

Siima eSIMs for Cambodia ride Cellcard and Smart Axiata. Both cover the cities and main highways well; Smart generally reaches further into the provinces.

Coverage around Phnom Penh

Riverside and the centre

Good 4G along Sisowath Quay, around the Royal Palace and through BKK1. The city is flat and low-rise, and coverage is consistent across it.

Tuol Sleng and Choeung Ek

Both memorial sites are covered. The audio tours are downloadable and worth loading in advance so you are not standing in the courtyard waiting for a stream.

Siem Reap and Angkor

Same country plan. Siem Reap town has strong coverage and the Angkor complex is served across most of the main circuit, thinning at the outlying temples like Beng Mealea.

Kampot, Kep and Koh Rong

The southern towns are covered. Koh Rong and Koh Rong Sanloem have signal in the main beach areas and very little elsewhere on the islands.

How much data you need

Ten days in Cambodia is 3–5 GB. Grab and PassApp use, maps and translation are the bulk — Khmer script does not lend itself to guesswork.

Work it out with our data usage calculator →

Frequently asked questions

Does my Cambodia eSIM work at Angkor Wat?
Yes. Siima plans for Cambodia are country-wide, covering Phnom Penh, Siem Reap and the Angkor complex. The main temple circuit has coverage; the remote jungle temples are patchier.
Can I use the same eSIM in Vietnam or Thailand?
No — each needs its own country plan. Overland crossings from Cambodia to both are common, so if your route includes them, an Asia regional plan covering all three on one eSIM is the simpler option.
How do I set up an eSIM before arriving in Phnom Penh?
Install it at home while you still have Wi-Fi: open Settings → Cellular → Add eSIM and scan the QR code from your Siima confirmation email. Leave the line switched off until you land — the plan starts counting from first use in Cambodia, not from purchase.
How much data do I need for a trip to Phnom Penh?
Ten days in Cambodia is 3–5 GB. Grab and PassApp use, maps and translation are the bulk — Khmer script does not lend itself to guesswork.
Is an eSIM cheaper than roaming in Phnom Penh?
Almost always. Daily roaming passes from most home carriers run $10–15 per day, while Siima plans covering Phnom Penh start from $25.88 for the whole trip. You also avoid per-megabyte charges if you exceed a roaming pass allowance.
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