Public WiFi in mainland China carries the same general risks as public WiFi anywhere; the added local quirk is that many networks require a phone-number SMS login just to connect.
An open, unsecured network is more exposed than a private encrypted one, the same as anywhere in the world. A VPN — which many travelers already use to reach blocked sites — also happens to encrypt your traffic on any open network.
Use a VPN on any public network, and save banking or other sensitive logins for a trusted connection.
The usual risks, plus a China-specific login quirk
The standard caution about open, unsecured public WiFi applies in China the same way it does anywhere in the world — an open network without a password is more exposed than a private, encrypted one. One local quirk worth knowing: many public networks (cafes, malls, some hotels) are reported to require a phone-number SMS login before you can connect at all, which can be a hurdle without a working local number.
A VPN is reported to be useful here for two separate reasons at once: it's what most travelers use to reach sites and apps that are blocked in mainland China, and it also encrypts your traffic on any network you're on, public or otherwise.
A data eSIM gives you a connection of your own, so you're not depending on an unfamiliar shared network — or its SMS-login wall — for anything that matters.
What to rely on instead of open WiFi alone
A VPN that connects successfully
A working VPN both restores access to sites and apps blocked in mainland China and encrypts your traffic on whatever public network you join.
Compare VPN options for ChinaA data eSIM as your own fallback
A data eSIM plan gives you a connection you control, so you're never depending on an unfamiliar public network — or its login system — for anything sensitive.
Compare China travel eSIMsCheck your hotel's WiFi setup
Hotel WiFi in China is reported to have its own quirks worth knowing before you rely on it for work or anything sensitive.
Read: China hotel WiFi guideBefore you connect
Turn on a VPN that connects successfully before joining any public network — it covers both the blocked-sites problem and general traffic protection at the same time.
Save banking, payment apps, and other sensitive logins for a trusted connection — your own data eSIM, or a VPN-protected network — rather than an open public one.
A data eSIM plan means you're never dependent on an unfamiliar public network, or its SMS-login wall, for anything that matters.
Real mistakes travelers make
Assuming you'll just connect like at home
Many public WiFi networks in China are reported to require a phone-number SMS login before granting access — without a working local number, that wall can be hard to get past.
Workaround: Keep a data eSIM as a fallback so you're not depending on the local network's login system at all.
Treating any open network as safe for banking
An unsecured, password-free public network carries the same general exposure it would anywhere else in the world — nothing about being in China changes that.
Workaround: Save banking and other sensitive logins for a trusted or VPN-protected connection instead.
Quick habits for public WiFi in China
Turn on a VPN before joining any public network.
Keep a data eSIM as a fallback connection you control.
Save banking and sensitive logins for a trusted connection.
Expect some public networks to ask for a phone-number SMS login.
Frequently asked questions
Is it safe to use public WiFi in China?
Public WiFi in China carries the same general risks as public WiFi anywhere — an open, unsecured network is more exposed than a private one. A VPN that connects successfully covers both that risk and the separate issue of reaching blocked sites.
Why does WiFi in China sometimes ask for my phone number?
Many public networks in China are reported to require a phone-number SMS login before you can connect. Without a working local number, that can be a hurdle — keeping a data eSIM as a fallback avoids depending on it.
Should I use a VPN on hotel or cafe WiFi in China?
Generally yes — a VPN that connects successfully both restores access to sites and apps blocked in mainland China and adds encryption on any public or shared network.
Is it safe to check my bank account on public WiFi in China?
The same general advice that applies anywhere applies here too: save banking for a trusted or VPN-protected connection rather than an open public network.
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