Stay Connected in Cambodia

Connectivity in Cambodia is one of those pleasant surprises travelers don't expect. 4G coverage across Phnom Penh, Siem Reap, and Sihanoukville is solid, prices for prepaid data are among the cheapest in Southeast Asia, and SIM registration is refreshingly painless compared to neighbors like Thailand or Vietnam. That said, coverage thins out fast once you head into rural Mondulkiri, the temple complexes outside central Angkor, or the southern islands where signal depends entirely on which carrier you picked. Power cuts still knock out cell towers in smaller towns, so don't rely on a single connection method for anything mission-critical. Hotel WiFi in Cambodia is the frustration. It is wildly inconsistent. A four-star property in Siem Reap might give you slower speeds than the $8 guesthouse next door. Most travelers end up using mobile data as their primary connection rather than depending on hotel networks, which is the opposite of what you'd expect.

Three carriers dominate Cambodia: Cellcard, Smart Axiata, and Metfone. Smart tends to win on raw 4G speed in Phnom Penh and Siem Reap, often clocking 30-50 Mbps in the city centre, and it is the carrier most expats default to. Metfone, owned by Vietnam's Viettel, has the widest rural footprint. If you're heading to Ratanakiri, Koh Kong, or remote Cambodia border crossings, Metfone is the safer bet. Cellcard sits in the middle on coverage but tends to have the friendliest English-language customer support and tourist-focused plans. 5G has rolled out in central Phnom Penh and parts of Siem Reap as of now. You'll need a compatible handset. The practical difference over 4G is modest for most travel use. Speeds drop noticeably in the temple zones around Angkor Wat. Expect 4G that works for messaging and maps. It struggles with video calls. Power outages still occasionally take out towers in smaller provinces, so signal can disappear for an hour or two without warning. Coverage gets spotty once you're on the islands. Koh Rong Sanloem is one example. Fair warning.

Hotel, airport, and cafe WiFi in Cambodia carries the same risks as anywhere else. Open networks leak traffic. Anyone on the same connection can potentially see unencrypted data, and tourist-heavy spots in Siem Reap and Phnom Penh are obvious targets for opportunistic snooping. The practical risk for most travelers isn't dramatic identity theft. It is session hijacking on accounts you check casually from a cafe. A VPN like NordVPN encrypts the traffic between your device and its servers, so even on sketchy WiFi at a riverside bar in Phnom Penh, your banking app or email stays private. Worth noting: Cambodia doesn't restrict major Western sites. Some neighbors do. A VPN here is about security rather than circumvention. If you're working remotely from Cambodia for any length of time, treating VPN-on as the default rather than the exception is the move.