Wi-Fi in China: how hotels, airports and cafés log you in, and why mobile data is usually easier

How public Wi-Fi in China differs from Thailand

In Thailand many venues simply hand you a Wi-Fi password. In mainland China, public Wi-Fi is mostly tied to user identification under local rules. The common methods are a login page that texts a code to a Chinese mobile number, or a passport scan at a kiosk in airports and large stations. If you carry only a Thai SIM or a data-only eSIM, that first step can get stuck.

Beyond login, every Wi-Fi network on the mainland exits inside China, so the same filtering applies. See the overview in “Great Firewall of China Explained for Travellers”.

Comparison table: place, login method and foreign apps

Airport Wi-Fi: the passport kiosk

Large Chinese airports often provide kiosks where you scan your passport to receive a temporary Wi-Fi code. Kiosks are usually near arrival exits or information counters, and codes are typically time-limited. Check signs or staff, since each airport sets its own rules, and compare with using an eSIM in “Airport Wi-Fi or an eSIM: which to use when”.

• Keep the physical passport ready at the kiosk, since scanning uses the real document.
• Kiosks can queue up after several flights land; mobile data is faster if you must book a ride or message family.
• Even once connected, foreign apps may still not open.

Hotel and café Wi-Fi

Chinese hotels usually give a Wi-Fi password at reception or on the room card, and some ask for room number and surname, which typically avoids SMS. Speed depends on the hotel, and because it is a mainland connection, LINE, Google and Instagram usually fail. Chain cafés often log you in by SMS to a Chinese number or a WeChat QR scan, which needs a WeChat account you have already set up. See “WeChat Setup for Thai Visitors Before a China Trip”.

On a multi-night stay, use hotel Wi-Fi for app updates and large downloads to save eSIM data, but fetch anything from foreign sites before you fly, since it may not download on hotel Wi-Fi. For how much data common apps use, see “How much data does Google Maps actually use?”.

If you have no Chinese number

1. 1Ask at the desk firstHotel or venue staff often have a guest code or a login path that avoids SMS.
2. 2Use passport kiosks at airports and big stationsHave the physical passport ready and finish this before queueing for a taxi or train.
3. 3Switch to mobile data when the login page stallsA login page that will not load or an SMS that never arrives is common; do not waste time waiting.
4. 4Set up the Chinese apps you need in advanceSet up WeChat and Alipay at home while the Thai SIM can still receive SMS. See “Using a Credit Card in China and Linking a Card to Alipay or WeChat Pay”.

Safety on public Wi-Fi

• Avoid banking or entering card details on public Wi-Fi; use mobile data instead.
• Check the network name with staff before joining, since look-alike fake networks exist everywhere.
• Turn off auto-join and forget the network when you are done.
• Do not enter passport or phone details on an unfamiliar login page unless needed.

More tips are in “Using public Wi-Fi abroad without taking risks”.

Why mobile data is more practical

During the day you need data on the move: calling a ride, scanning to pay, opening rail tickets and checking maps, none of which happen conveniently beside a Wi-Fi router. An eSIM installed before the flight connects the moment you land, without an SMS from a Chinese number, and usually opens foreign apps. It is data only, with no phone number, so keep your Thai SIM for bank OTPs and test the apps you need before depending on them. See “How to install an eSIM, step by step (iPhone and Android)” and “China eSIM Without a VPN: How It Works and What to Check Before Buying”.

查看中國的 eSIM 方案

常見問題