Set up a Cambodia eSIM before you fly

Last updated: September 17, 2026

A Cambodia eSIM can connect when you arrive at Phnom Penh or Siem Reap, without buying and registering a SIM at a kiosk. Below is the whole process: choosing a plan, loading it onto your iPhone or Android before departure, and turning it on when you land. Set-up is a few minutes at your kitchen table.

Installing ahead is useful in Cambodia. A local SIM bought at the airport requires passport registration, and terminal WiFi can be inconsistent. With data already loaded, you can order a ride, message your guesthouse, and check the route into town after arrival.

First, will your phone take an eSIM?

Most handsets sold in the past six years will. A quick look now saves a scramble at the airport.

Phones that handle eSIM

iPhone: the XR and XS started it, and every model since qualifies (SE 2020 included)
Samsung: Galaxy S20 upward, plus the Z Fold and Z Flip lines and most Note 20 models
Google Pixel: from the Pixel 3 forward, bar a handful of locked early units
Thirty-second test: dial *#06#. An EID number beside the IMEI confirms the handset can run an eSIM

The handset also has to be carrier-unlocked. Anything bought outright or SIM-free is; a phone still mid-way through a carrier instalment plan might not be.

Step 1: buy the Cambodia eSIM

Sort this out at home, on your own connection. Travelsim Asia asks for no app and no account. You pick the data size, pay, and the eSIM arrives by email within minutes.

Your move	The result
Choose a data size on the site	Sizes span 1 GB up to 20 GB, every one riding both Metfone and Cellcard
Pay by card	No sign-up, no app install, no account to remember
Open your inbox	The eSIM shows up as a QR code plus a one-tap install link

Unsure which size fits? A 1 GB plan handles a short stop in Phnom Penh, 5 GB carries a normal week around Siem Reap and the temples, and 10 GB is comfortable for two weeks with Angkor mapping, ride apps, and evening video calls home. Our Cambodia eSIM prices guide lays the sizes out side by side.

Step 2: load it on before departure

Add the eSIM at home while you have WiFi or mobile data. Loading it does not spend a byte or start any countdown; it simply parks the profile on your phone until you need it. There are 180 days from purchase to switch it on, so early is fine. Keep the confirmation email so the QR code stays within reach.

iPhone

Tap the install link from your email on the iPhone, or open Settings → Cellular → Add eSIM and scan the QR code.
Walk through the prompts. Give the plan a clear label such as "Cambodia" so you can spot it later.
Keep your home line as the default for now. The Cambodia eSIM gets switched on after you arrive.
Leave the eSIM in place once added. Deleting it wipes the plan permanently.

Android (Samsung, Pixel, and the rest)

Open Settings → Connections → SIM manager → Add eSIM on Samsung, or Settings → Network & internet → SIMs → Add eSIM on Pixel.
Scan the QR code from the email. Reading that email on the same phone? Save the QR image, then pick the "upload image" or "enter manually" route.
Give it a name and finish. Your home SIM stays the default line until you land.
Wording shifts a little between brands and Android releases, but the path is the same one everywhere.

Step 3: turn it on when you land

Landing at Phnom Penh (PNH) or Siem Reap-Angkor (SAI), the action is identical: make the Cambodia eSIM your live data line. This is the moment the plan begins, when the phone first registers on a Cambodian network.

iPhone: Settings → Cellular → tap the Cambodia eSIM → switch on Turn On This Line, point Cellular Data at it, and enable Data Roaming for that line.
Android: Settings → SIM manager (or SIMs) → enable the Cambodia eSIM, set it as the mobile data SIM, and flip Roaming on for it.
The roaming switch reads worse than it is. Because the plan is prepaid, that toggle just points the handset at a local network. In Cambodia that is Metfone or Cellcard, whichever holds up better where you stand. Nothing extra gets billed behind it.

Hold onto your home number. Leave the home SIM enabled for calls and texts, useful for bank one-time codes, and let the Cambodia eSIM carry data. You get local speed and stay reachable on your usual number.

What to do the minute you arrive

Public WiFi at PNH and SAI can be inconsistent. A few habits smooth the first hour:

Flip the eSIM on inside the terminal. Do it at the gate or after immigration so you can book a ride from the terminal.
Set up a ride app before you go. Grab, PassApp, and Tada all run in Phnom Penh and Siem Reap and take the haggling out of a tuk-tuk or car. Have one installed and signed in ahead of time.
Install Telegram. Guesthouses, drivers, and tour operators across Cambodia tend to coordinate over Telegram rather than email, so having it ready keeps replies quick.
Store the confirmation email offline. It holds your QR code and plan details for any reinstall down the line. Or print it, old school :)

eSIM against a SIM bought at the airport

PNH and SAI both have arrival-hall counters for Metfone, Cellcard, and Smart, and the tourist packs are inexpensive. They are a practical option when you need a local Cambodian number, but passport registration is required.

Airport SIM counter

Comes with a local Cambodian number
Sold at kiosks in the arrivals hall
Passport registration required: Cambodian rules mean the vendor scans your passport and registers the SIM before it works
Cash only at many booths, and queues after a bank of flights lands
A physical swap, so your home SIM comes out and can go missing

eSIM (Travelsim Asia)

Bought and loaded before departure
Connected the moment you land, no line to join
Home SIM stays put, your number stays live
No kiosk registration, no paperwork, no swap
Rides both Metfone and Cellcard on one profile
No local Cambodian number (use WhatsApp or Telegram for calls)

Troubleshooting

Nothing loading after arrival? Run through three settings: the Cambodia eSIM is picked for mobile data, its Data Roaming is switched on, and Airplane Mode sits off. A quick Airplane Mode flick, a couple of seconds each way, prompts the phone to re-register.
Still blank? Reboot the handset. On arrival, registration on the local network often only completes after a full restart.
Bars dropping out on a country road? Wait a beat; a two-network profile hunts for whichever of Metfone and Cellcard is stronger nearby. That Airplane Mode flick speeds the swap.
Running short on data? Add more from the web portal linked in your email. Nothing to reinstall and no second eSIM, the top-up simply joins the plan already on your phone.
QR code won't read? Fall back to the one-tap link in the email, or download the QR image and feed it into the "add eSIM" screen on your phone.

Cambodia eSIM setup: frequently asked questions

Does my phone support eSIM?

Almost every phone from the past few years does: iPhone XR/XS and newer, Samsung Galaxy S20 and newer, Google Pixel 3 and newer. Quick test: dial *#06# and look for an EID number under the IMEI. If it's there, you're eSIM-ready. The phone also needs to be carrier-unlocked.

When should I install my Cambodia eSIM?

Before you fly, on home WiFi. Installing loads the eSIM onto your phone but does not start the plan, so you can do it days ahead. You have 180 days from purchase to switch it on. Activation happens when you land and connect, and that is when the validity clock starts.

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

No. Passport registration applies to physical SIMs bought from a counter or shop in Cambodia, where the vendor scans your passport before the SIM works. A Travelsim Asia eSIM is bought online and skips that step entirely.

Why do I need to turn on data roaming?

A travel eSIM is technically roaming onto the local networks, so the roaming toggle has to be on for that line. There are no roaming charges: the plan is prepaid, and with Travelsim Asia the eSIM connects to Metfone or Cellcard, whichever is stronger where you are.

What if I have no data after landing in Cambodia?

Check three settings: the Cambodia eSIM is your mobile-data line, Data Roaming is enabled for it, and Airplane Mode is off. Then toggle Airplane Mode on and off, and if it still won't connect, restart the phone; network registration often completes after a reboot.

Do I get a Cambodian phone number with an eSIM?

No, travel eSIMs are data-only. In practice that is rarely a problem: guesthouses, drivers, and tour operators in Cambodia mostly reply on Telegram and WhatsApp, and your home SIM stays active for calls and SMS codes. If you specifically need a local number, a registered local SIM is the way, with the passport registration that involves.