Three UK Does Not Cover Cambodia (2026)
Updated May 2026 · By The Roaming Cost Desk
Cambodia is not in Three UK's 71-country Go Roam coverage list. Three UK customers traveling to Cambodia will have no mobile service. A travel eSIM is the only wireless data option. HelloRoam offers 1GB for $3.99 on Cellcard, Smart Axiata.
Three UK does not cover Cambodia
Cambodia is not in Three's 71-country Go Roam list. No service available for Three UK customers.
Cambodia is not in Three's Go Roam coverage
Three UK's Go Roam covers 71 countries. Cambodia is not one of them. Three customers traveling to Cambodia will have no mobile data, voice, or text service from their carrier. The phone will show "No Service" or "Emergency Calls Only." A travel eSIM is the only wireless data option for Three customers visiting Cambodia. Install the eSIM before departure and set it as your default data line.
Alternatives for Three UK customers in Cambodia
Without Go Roam coverage in Cambodia, Three UK customers have three options: (1) a travel eSIM at $3.99 for 1GB on Cellcard and Smart Axiata, (2) a local physical SIM from Cellcard and Smart Axiata (requires passport registration and an unlocked phone), or (3) Wi-Fi only. The travel eSIM is the fastest and most convenient option because it installs before departure and activates on landing.
Does Three UK work in Cambodia?
Yes. Three UK works in Cambodia and charges £2.75/day for roaming through the Go Roam (new customers).
Three UK works in Cambodia at £2.75/day. You get 12GB cap at 4G speeds. Your phone connects through Cellcard, Smart Axiata, Metfone networks. Cambodia has none 5G coverage. A 7-day trip costs £19.25 in roaming fees. A travel eSIM costs a fraction of that.
Three UK covers Cambodia at £2.75/day. Cambodia has none 5G coverage.
How much does Three UK charge in Cambodia?
Three UK charges £2.75/day in Cambodia. Moderate for short trips, but a travel eSIM still saves money on trips over 3 days.
| Trip | Three UK | eSIM | Savings |
|---|---|---|---|
| 3-day trip | £8.25 | $3.99 | $4.26 |
| 7-day trip | £19.25 | $3.99 | $15.26 |
| 14-day trip | £38.50 | $3.99 | $34.51 |
| 30-day trip | £82.50 | $3.99 | $78.51 |
A HelloRoam eSIM for Cambodia starts at $3.99 for the entire trip, with 1GB at local network speeds. No daily fees, no hidden charges, no contract.
eSIM alternative for Cambodia
Same networks, fraction of the cost.
Why an eSIM beats Three UK roaming
A travel eSIM connects to Cellcard, Smart Axiata at full LTE speed for $3.99 total.Three UK charges £2.75 per day for the same networks. The eSIM has no daily charges, no auto-enrollment, and no hidden fees.
- ✓204+ carrier networks worldwide
- ✓180-day refund policy
- ✓Instant QR install
- ✓Instant QR install
- ✓5G where available
- ✓Keep your home number
- ✓Instant QR install
- ✓5G where available
- ✓Keep your home number
Setup Guide: eSIM Alongside Three UK
- 1Put your phone in airplane mode before takeoff.Prevents Three UK auto-enrollment in roaming passes.
- 2Buy a travel eSIM for Cambodia.HelloRoam, Airalo, and Saily sell Cambodia plans from $3.99.
- 3Install the eSIM via QR code.Label it "Cambodia data." Keep your Three UK line for SMS.
- 4Switch data to the eSIM after landing.Disable Three UK data roaming. Enable eSIM for data only.
- 5Switch back when you return home.Return to Three UK for data. The eSIM stays for next time.
Cost comparison: Three UK vs eSIM in Cambodia
Savings across different trip lengths.
| Trip Length | Three UK Cost | eSIM Cost | You Save |
|---|---|---|---|
| 3 days | £8.25 | $3.99 | $4.26 |
| 7 days | £19.25 | $3.99 | $15.26 |
| 14 days | £38.50 | $3.99 | $34.51 |
| 30 days | £82.50 | $3.99 | $78.51 |
Cambodia network and coverage context
Local Networks
Three UK roaming connects to Cellcard, Smart Axiata in Cambodia. Average download speed is 20 Mbps. A travel eSIM connects to the same networks at the same speeds for a fraction of the cost.
5G Availability
5G coverage in Cambodia is none. No commercial 5G Both carrier roaming and travel eSIMs can access 5G where available, depending on your device.
Connectivity Quirks
Cambodia uses USD alongside Cambodian riel
Metfone (Viettel) has widest coverage
Incredibly cheap mobile data — under $3 for 15GB