Siem Reap eSIM — plans from ₹299.00

Siem Reap-Angkor International (SAI) replaced the old in-town airport and sits well east of the centre, which changes the arrival maths: the drive to Wat Bo or the Old Market now takes real time rather than a few minutes. Operator counters in arrivals sell tourist SIMs against your passport, but with a longer transfer ahead of you, queueing for one is time you would rather spend in the car.

Transport into town is by taxi or the tuk-tuks summoned through PassApp and Grab, both of which run in Siem Reap and both of which need data before a driver commits. Most visitors also arrive with a hotel transfer that has to be found in a car park, which is a messaging problem, not a driving one. An eSIM installed at home over Wi-Fi is the tidy answer: it goes live the moment your phone registers on a Cambodian network, and validity begins at that first connection, so you land already able to say where you are standing.

Smart Axiata, Cellcard and Metfone cover this corner of Cambodia, and your plan follows the strongest partner signal. In town, along Pub Street, around Wat Bo and out along the river, 4G is fast and consistent. Inside Angkor Archaeological Park the coverage is better than people expect: Angkor Wat, Bayon, Ta Prohm and the main circuits all hold signal, which is useful for the QR pass checks at temple entrances. It falls away further out, at Banteay Srei to a degree and noticeably at Beng Mealea and Koh Ker, where the jungle and distance both work against you. On Tonle Sap floating village boat trips, expect signal to come and go.

Download offline maps covering Angkor Park and the outer temple circuit, not just the town, because the park roads are a maze of similar junctions and mapping apps lose the plot under heavy tree cover. Keep data for your Angkor pass, which is checked as a QR code at multiple points, and for PassApp and Grab. Cafe Wi-Fi in the centre is genuinely good and there is a large remote-working crowd, so laptop days are easy; a hotspot covers the guesthouse. The practical quirk is the temple day itself, which is long, hot and starts before dawn: your phone is camera, map and ticket at once, so a power bank is not optional. Phnom Penh shares the Cambodia eSIM plan.