The strangest thing about a foreign phone in China
An incoming traveler's phone in mainland China behaves differently from a local one — and that turns out to be useful. A travel eSIM routed via a foreign network gets you to the apps and services you actually use back home. A local domestic SIM doesn't, by design. For a tourist, that distinction matters more than the rate per gigabyte.
Roamzy charges $3.48 per gigabyte in mainland China. That's $0.0034 per megabyte, billed in real time as your phone uses data. No subscription. No expiry on the unused balance. No minimum bundle. One per-MB rate across 192 countries — that's the shape of the invoice, not a marketing line.
How much will Roamzy actually cost on this trip?
A typical visitor to China uses 0.8–1.5 GB per day: Maps in a city of fifteen million, the camera-translator on a Chinese-only menu, ride-hail (the international apps that work for tourists), the high-speed rail booking, contactless payments (Alipay and WeChat Pay both accept foreign cards as of 2024), the occasional video call across a 12-hour gap. Call it 1 GB/day for the math:
| Trip length | Roamzy ($3.48/GB) | Tourist roaming pass | Local SIM |
|---|---|---|---|
| 3 days | $10.44 | $25–50 | $10–25 + passport, biometrics, queue |
| 1 week | $24.36 | $45–95 | $15–40 + paperwork |
| 2 weeks | $48.72 | $80–180 (often two passes) | $25–55 + 30-day cap |
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 SIM at PEK or PVG requires a passport, biometric capture, and a registration form. The eSIM skips it entirely — pre-installed at home, attached to a foreign network on landing.
What works on the network
Mainland Chinese networks are dense, fast, and well-maintained. Where service patterns differ from what travelers expect:
Some Western platforms behave differently from one connection to another in mainland China — the rules shift, and they aren't the network operator's call. If access to a specific platform matters for your trip, check the current state in our FAQ before you fly, and have a backup channel agreed with the people you need to reach.
- Beijing, Shanghai, Shenzhen, Guangzhou — 5G dense, throughput stable through subway and surface
- Tier-2 cities (Chengdu, Xi'an, Hangzhou, Suzhou) — 5G in central districts, solid LTE around them
- High-speed rail corridors — near-continuous signal at 350 km/h; brief drops in tunnels
- Yunnan, Sichuan back-country — variable; mountain villages on 4G or 3G
- Tibet, the far west — mountain physics; signal works in towns, drops between them
- Hainan and the southern coast — solid, both in cities and resort zones
Why is per-megabyte pricing simpler than packages?
A China trip is already cognitive load — visa logistics, an alphabet you can't sound out, a payments stack that's its own ecosystem, a translation gap on signs and menus. Connectivity should be the one thing that doesn't add to the pile.
Roamzy is built around that. No first-purchase promo to lure you, then jacked rates on the second top-up. No fine-print throttling. No auto-renewal you forgot to cancel and discover six months later. One rate, billed by the megabyte, balance carries.
How do I install my Roamzy eSIM?
| Plug type | Voltage | Frequency | iOS | Android |
|---|---|---|---|---|
| Type A, C, I | 220 V | 50 Hz | iPhone XS+ | Pixel 3+, Galaxy S20+ |
- Sign in to Roamzy via Telegram or Google — do this before you fly
- Top up the eSIM 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 on your home Wi-Fi)
- The counter starts the moment you land at PEK, PVG, CAN, or SZX
Set up the eSIM before you fly. Once on the ground, completing setup gets harder. Supported stablecoins, networks, and common iPhone/Android setup errors are in the FAQ.
What are Roamzy's honest limitations?
Three traps Roamzy doesn't have because they were never built in.
- No welcome promo that bait-and-switches your second top-up. The rate on top-up #1 is the rate on top-up #20.
- No fine-print throttling that surfaces during a video call home. One rate, full speed — first GB and the hundredth cost the same $0.0034/MB.
- No auto-renewal you forgot to cancel. Balance runs out, the eSIM stops.
It's not a marketing gimmick — it's an engineering decision born from indifference to gimmicks. You can't make a tariff cheaper than no fine-print and no expiry — so we don't.
What if my trip extends across the region?
China often pairs with neighbors. Roamzy keeps one rate per country — the eSIM finds the network in the new country and bills at that country's rate:
- Hong Kong — different jurisdiction, different rate, eSIM hands over at the boundary
- South Korea — short flight from Beijing or Shanghai
- Vietnam — common southern continuation
- If you want the underlying mechanics — how roaming actually gets priced and why it hurts