The kind of trip Cambodia actually is
You came for ten days — Phnom Penh, two days at Angkor Wat, a beach week on Koh Rong. You're now in week four. Kampot ate three days. The bus to Battambang ate two. You ended up with a slow boat back to Siem Reap that wasn't on the itinerary. Cambodia's like that. Trips here drift.
Roamzy charges $4.71 per gigabyte in Cambodia, which is $0.0046 per megabyte. Real-time billing on actual usage. No expiry on the balance. No reset. No subscription you forgot to cancel. One per-MB rate across 193 countries — the same on day three as on day forty-five.
How much does Roamzy cost over a long stay?
Take 1 GB/day as the realistic average. Hostels and cafés have Wi-Fi most of the time, so cellular is for the street, the tuk-tuk apps, and the long bus rides between cities:
| Trip length | Roamzy ($4.71/GB) | Local tourist SIM (re-bought) | Roaming on home number |
|---|---|---|---|
| 2 weeks (14 GB) | $65.94 | $15–35 (7-day pack + top-up) | $80–180 ($5–13/day) |
| 1 month (30 GB) | $141.30 | $30–65 (two packs back-to-back) | $200–450 |
| 2 months (60 GB) | $282.62 | $60–120 (three to four packs) | not realistic — nobody does this |
Competitor prices in columns 3 and 4 are 2025 ranges based on typical offerings; exact figures depend on your home carrier and the airport store you visit. Roamzy's rate in column 2 is our actual published rate from the pricing page.
A local Cambodian SIM is genuinely cheap if you're staying long. The trade is paperwork: passport scan, registration, and a tariff that resets every 7–30 days. Six weeks is multiple SIMs, multiple shops, and a balance that resets each cycle. Roamzy has one rate; balance carries to the next trip if you're not back this year.
What matters on a long trail?
- Hostel Wi-Fi is uneven outside the bigger cities. Phnom Penh and Siem Reap handle a video call. On the islands or up-country in Mondulkiri, it falls to barely-loading levels in the evening. Cellular goes from backup to primary.
- Google Translate is a tool, not a convenience. Khmer signage without English is normal outside the obvious tourist corridors. Camera mode on a hand-painted menu works only with data.
- Ride-hail is PassApp and Grab. Phnom Penh is well-served; Siem Reap is mixed; smaller towns run on tuk-tuks negotiated at the curb.
- Bus and slow-boat tickets book through Bookaway, 12Go, and the operator chats. The chats live in Telegram and WhatsApp.
- USD circulates alongside KHR. Most prices are quoted in USD; cards work in cities, not in markets. ATMs dispense both currencies.
Monthly data budget shapes up like this: maps ~5 GB, translator ~2 GB, messaging and home calls ~8 GB, ride-hail ~1 GB, bookings and photo upload to Telegram ~10 GB, the rest is OS background traffic. That's the 30 GB month.
Where does Roamzy work in this country?
- Phnom Penh, Siem Reap, Sihanoukville, Battambang — solid LTE in the cores, 5G rolling out in the capital, throughput fine for video calls
- Kampot, Kep, Kratie — 4G in town, weakening on the river-side back roads
- Angkor temple complex — LTE across most of it; the further into the jungle archaeological sites, the spottier
- Koh Rong, Koh Rong Sanloem — 4G in resort zones at the pier; off-pier signal is uneven
- Mondulkiri and Ratanakiri (the Eastern Highlands) — patchy 4G, drops on the long jungle stretches; offline maps mandatory
- Border crossings to Thailand (Poipet) and Laos (Veun Kham) — the eSIM hands over the moment you cross, no setup change
How do I install my Roamzy eSIM?
| Plug type | Voltage | Frequency | iOS | Android |
|---|---|---|---|---|
| Type A, C, G | 230 V | 50 Hz | iPhone XS+ | Pixel 3+, Galaxy S20+ |
- Sign in to Roamzy via Telegram or Google
- Top up with a minimum of 20 USDT — stablecoins, no cards, no banks, no FX surcharges
- The QR code appears in the dashboard once payment confirms
- Settings → Cellular → Add eSIM → scan QR (do this before you fly)
- The counter starts the moment you land at PNH or REP
Supported stablecoins, networks, and common iPhone/Android setup errors are in the FAQ.
What are Roamzy's honest limitations?
Long-trip travelers historically lose money to three things, and Roamzy doesn't close those traps — they don't exist in the product.
- No expiry on the balance. Loaded $50, used $12 on the first trip — the rest waits for the next one. Next year, the year after, still there.
- No auto-renewal. When the balance runs out, the eSIM stops. No background charge to a card you forgot about six months later.
- No throttling. One rate. The first GB and the hundredth cost the same $0.0046/MB.
Cambodia runs on the same quiet rule as the rest of Roamzy: charge for megabytes, skip the choreography. Once the fine print is gone, the price is just the price, and there is no clever way around that.
What if the trail continues across borders?
A long Southeast Asia route is the norm. Roamzy uses one rate per country, no manual switching at borders — the eSIM finds the network in the new country and bills at that country's rate:
- Thailand — the Poipet–Aranyaprathet crossing settles in minutes
- Laos — common northern continuation via the Mekong
- If you want context on why home-number roaming hits so hard — how roaming pricing actually works