Quick answer
In Sihanoukville and on the islands, mobile data matters most on travel days: checking ferry times, showing e-tickets, and messaging your hotel about pickups. The eSIM works on the Metfone network, which covers the town and the busier island areas; signal on remote beaches and on boats can be patchy.
Where will I use data on the coast?
Island guesthouse Wi-Fi can be slow or only work near reception. You will want mobile data for ferry bookings, maps between beaches, messages to boat operators, and calls home over WhatsApp or Telegram.
Does the eSIM work on Koh Rong and Koh Rong Sanloem?
It depends on the Metfone network where you are. The main villages and busier beaches usually have signal, while quieter bays, jungle paths, and the open water on the crossing may not. Screenshot your ferry ticket, hotel address, and return times before the boat leaves.
Which plan suits a beach trip?
Island trips often run longer than planned. For a week of maps, messages, and photo sharing, 7 days · 5 GB covers light use, and a 3 GB a day plan suits heavier use. If you are combining the coast with Phnom Penh or Siem Reap, pick a 15-day or 30-day plan so you do not run out mid-trip.
Frequently asked questions
Is there signal on Cambodian island beaches?
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On the busier beaches and in the villages, usually yes. Remote beaches can have weak or no signal, depending on the network.
Can two people share one plan on the islands?
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You can share data with hotspot, which is included. If you both want your own line, buy two plans in one order: each comes with its own QR code.
Do I need a new eSIM for the islands?
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No. One Cambodia eSIM works across the country, including the islands, wherever the Metfone network reaches.
Related guides
Sihanouk International Airport (KOS) eSIM guide
The coast airport for Sihanoukville and the Koh Rong islands.
Kampot and Kep eSIM guide: river towns, pepper farms, and the crab market
Riverside sunsets, pepper farms, and the crab market.
How much data do I need in Cambodia?
Rough numbers for maps, social media, video, and work.