Yes. The main Angkor Archaeological Park cluster — Angkor Wat, Bayon, Ta Prohm — has reliable 4G on Metfone and Smart Axiata. The outer temples like Banteay Srei and Phnom Kulen drop to 3G or lose signal in the forest. Download offline maps before you leave Siem Reap town if you are visiting the remote barays or the Roluos Group.

Cellular coverage on the islands is patchy and limited to a few on-island towers. Most resorts provide Wi-Fi. The speedboat crossing from Sihanoukville is a dead zone on all carriers. Download maps, booking confirmations, and any tickets before you board the boat, and plan to rely on resort Wi-Fi once you arrive.

A typical week — Grab rides, Google Maps navigation, WhatsApp chats, KHQR payment app checks, occasional photo uploads — runs 3–5 GB. Add another 2–3 GB if you are streaming music, posting Instagram stories, or making daily video calls. If you are only using maps and rideshare, 2 GB is enough.

Yes. Both apps work on the eSIM. Grab dominates Phnom Penh and Siem Reap; PassApp is the local alternative. Outside those cities, coverage thins and you will negotiate with tuk-tuk drivers directly. Tada and InDrive also operate in Phnom Penh for remork rides.

KHQR is a QR-code standard, not a cellular service, so it works on any data connection. You will need a local payment app — Wing for Tourists is the easiest for foreigners, or you can top up ABA at a local agent. The eSIM provides the data to scan codes and confirm transactions in real time.

Metfone has the densest 4G across Siem Reap town and the main Angkor temple cluster. Smart Axiata is the premium alternative with strong urban reach but slightly thinner coverage at the outer temples. The eSIM switches between both automatically, so you get the stronger signal at each location without manual intervention.

Yes. Both towns have solid 4G from Metfone and Smart Axiata. Rural stretches between Battambang and Phnom Penh, and along the coast near Kampot, drop to 3G or lose signal on remote roads. Download offline maps if you are driving the countryside or visiting Bokor National Park.

Yes. WhatsApp voice and video calls work on the eSIM just like any other data app. A 30-minute voice call uses roughly 15–20 MB; a video call uses 150–200 MB. If you are calling home daily, budget an extra gigabyte for the week.

Coverage is reliable on National Road 6 for most of the route. You will hit a few dead zones in rural stretches between towns, but the bus stays on the main highway where Metfone and Smart Axiata both have towers. Download offline maps and any entertainment before departure if you want uninterrupted access.

The airport SIM counters sell Cellcard, Smart, and Metfone prepaid cards. You will pay roughly the same price, but you have to queue, hand over your passport for registration, and swap the physical card. The eSIM activates before you land, skips the counter, and does not require passport registration. If your phone supports eSIM, it is faster and less hassle.

Coverage in the Cardamom range is sparse. Towns like Koh Kong have 4G, but the forest roads and trekking routes are 3G or dead zones. If you are doing a multi-day trek or a remote homestay, download offline maps, trail guides, and any emergency contact info before you leave the last town with signal.

Yes. Hotspot is enabled by default on esima eSIMs. You can tether a laptop, tablet, or a travel companion's phone without extra charges. Useful if you are working remotely from a Phnom Penh café or need to share connectivity on a long bus ride to Siem Reap.

Cellular infrastructure in Cambodia is not affected by rain the way it is in some countries. Heavy monsoon downpours between May and October can slow speeds temporarily due to network congestion, but coverage does not drop. The bigger issue is flooded roads cutting physical access to remote areas, not the cell towers themselves.