Getting Online In China: SIM, eSIM, And Which One To Choose
You need mobile data from the moment you leave the airport, and passports are mandatory at every counter. Here’s the cheapest reliable route, what registration involves, and why your eSIM plan might be slower than you expect.
Everything useful about travelling in China runs through your phone. Payments, maps, ride-hailing, train tickets, restaurant queues, translation. Arriving without mobile data isn’t an inconvenience so much as a genuine operational failure — you’ll be unable to pay for most things.
You have three realistic options, and they suit different trips. A Chinese SIM is cheapest and fastest on the network. A travel eSIM is the least friction and works before you land. International roaming is the simplest of all and usually the most expensive.
The local SIM route
Every mobile counter in China needs your passport, and this isn’t negotiable or optional. They will scan the photo page, take your photo, and register the number to you personally. Budget around thirty minutes from entering the shop to having working data.
Airport desks are open late and speak enough English to get through the transaction, which is worth paying extra for at midnight after a long-haul flight. City-centre flagship stores charge noticeably less for the same package but expect you to handle more of the conversation. Typical tourist-friendly packages land in the tens of yuan per month for a generous data allowance in metropolitan areas.
| Option | Cost | Speed | Best for |
|---|---|---|---|
| Chinese SIM from city store | Lowest | Fastest locally | Trips over 10 days |
| Chinese SIM from airport desk | Slightly higher | Fastest locally | Late arrivals |
| Travel eSIM installed before flying | Mid | Good, sometimes routed | Short trips, easy setup |
| Home carrier roaming | Highest | Depends on partner | Two-day stopovers |
Put numbers on it before you commit. A basic monthly plan with several GB of data and a local number usually lands somewhere around ¥50 to ¥100, and you can top it up inside the app later. Travel eSIM packages tend to start near US$5 for a small 1 GB bundle and then get expensive per gigabyte, which suits a four-day stopover badly and a two-week trip worse. Compare both against your home carrier's daily roaming rate — for most people that figure sits somewhere between ¥30 and ¥60 a day — and the right answer becomes obvious quickly.
Where eSIM stops being perfect
Travel eSIMs are genuinely convenient — buy online, scan a code, and you are connected before the aircraft door opens. The catch is routing. Many of these plans tunnel your traffic to a server outside China, which means services that ought to be fast are loading slowly, and anything region-restricted based on your IP will behave oddly.
The practical symptom is this: your bank app works fine, but the Chinese food-delivery app times out, and you can’t work out why. That’s routing latency, not a broken phone. A local SIM avoids it entirely.
One mistake costs people half an afternoon: letting whoever is behind the counter pick the package for you. Monthly bundles aimed at local residents carry allowances you will never touch and pricing that assumes a year-long contract. Ask for a visitor plan by name, or point at the tourist-facing menu that most flagship stores keep behind the desk. If the conversation stalls, go to another branch — the three carriers compete hard, and the next shop will happily quote you something better.
Getting through registration
China Mobile, China Unicom and China Telecom all run English-capable flagship stores in major cities. Bring the passport itself rather than a photocopy, expect a signature on paper, and keep the receipt — some hotels ask to see your number registration when checking you in.
One detail people miss: your new number will receive a lot of spam SMS in Chinese. Harmless, mildly annoying, and easily filtered once you have had a day to work out which messages matter.
What about hotel Wi-Fi?
Available and generally fast in cities, but it won’t help you pay for a taxi or navigate a subway station. Public Wi-Fi at chains like Starbucks usually requires a Chinese phone number to authenticate, which rather defeats the purpose for short-stay visitors.
Treat Wi-Fi as a supplement. You need your own mobile data regardless.
Questions people actually ask
Should I just use roaming for a short trip?
For two or three days, honestly yes — the convenience is worth the premium, particularly if you’ll be in meetings rather than navigating back streets. Past about four days the arithmetic starts favouring a local option quite clearly.
Will my phone even work here?
Almost certainly. Chinese carriers use LTE bands that overlap substantially with Europe and much of Asia. Dual-SIM phones make the whole question moot: keep your home number active for banking codes and run a Chinese SIM alongside it.
Can I buy a SIM as soon as I land?
At the main international airports, yes — counters operate late and handle foreign passports routinely. Bring cash or a working card, and if the desk quotes something wildly above you expected, compare against a city store the next morning rather than arguing about it bleary-eyed.
Plan pricing and packaged data allowances change frequently. Treat figures here as indicative ranges rather than quotes.
