Quick answer
The easiest way to have data at Techo International Airport (KTI) is to install a Cambodia eSIM on Wi-Fi before you fly, or on airport Wi-Fi when you land, then turn on Data Roaming for the eSIM line. You skip the SIM counters and can book Grab or PassApp before you leave the terminal.
Should I buy a SIM at Techo or an eSIM before I fly?
SIM sellers are a common sight in Cambodian arrivals halls, but after a long flight you queue, hand over your passport, and wait while someone sets up the card. With an eSIM bought before the trip, the line is already on your phone and you only need to switch it on.
An eSIM also keeps your home SIM in the phone, so SMS and bank codes still reach your usual number while the Cambodia line handles mobile data.
When should I install the eSIM?
Install it on Wi-Fi, either the day before you fly or on airport Wi-Fi when you arrive. Plan days start when you install, so installing the day before counts as one day of the plan. The QR code arrives by email after payment and also stays on your order page.
- 1Scan the QR on Wi-Fi and label the new line “Cambodia”.
- 2On landing, turn off airplane mode.
- 3Turn on Data Roaming for the Cambodia line, and choose it for mobile data.
- 4Keep Data Roaming off on your home SIM.
- 5Open a map before you leave the terminal, so you know the eSIM is working.
How do I get from Techo to central Phnom Penh?
Techo is well south of the city, farther out than the old Phnom Penh airport, so allow time for the ride, especially at busy times of day. Grab and PassApp are the usual ride-hailing apps in Phnom Penh, and having data lets you compare prices and find your pickup point. Taxis and hotel transfers are other options.
If your hotel arranges a pickup, message the driver from the arrivals hall once your data is on. Share your live location if you cannot find each other.
What if I forgot to install the eSIM before the flight?
Connect to airport Wi-Fi and open the email or your order page. You need the QR on a second screen to scan it, or you can type the manual install code shown under the QR. Install the eSIM, turn on Data Roaming for it, and pick it for mobile data.
Frequently asked questions
Is Techo the same airport as the old Phnom Penh International?
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No. Techo International (KTI) replaced Phnom Penh International (PNH) for commercial flights in September 2025. It is a new airport south of the city. Check the airport code on your ticket.
Do I need data roaming on at Techo?
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Yes, for the eSIM line. It connects to Metfone as a roaming line, at no extra charge. Keep roaming off on your home SIM so your own carrier does not charge you.
Does Grab work at Techo Airport?
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Grab and PassApp are widely used in Phnom Penh. Once the Cambodia line is on for mobile data, the apps work as they would at home, including the pickup map.
Related guides
Cambodia trip checklist: eSIM, entry rules, and apps
What to sort out in the days before you fly.
How to install a Cambodia eSIM on iPhone
Scan the QR, label the line, and turn on Data Roaming.
Cambodia eSIM not working? Fixes for no data after landing
Five checks to run in the arrivals hall.
Phnom Penh eSIM guide: data for Grab, tuk-tuks, and the riverside
Riverside cafés, busy markets, and tuk-tuks on every corner.