How to Get Online in China: Data, Wi-Fi & the Great Firewall

China is one of the most connected countries on Earth — and one of the most confusing to get online in. The confusion comes from two separate problems that most guides blur together:

1. Getting a data connection at all — mobile data, a SIM or eSIM, Wi-Fi.
2. The Great Firewall — China filters many foreign services at the network level, so Google, WhatsApp and Instagram won’t load on a standard Chinese network.

This page separates the two and tells you exactly what to set up before you board.

The 30-second answer

• The cheapest data is a local Chinese SIM — but on it, Google, WhatsApp and Instagram stop working (they’re behind the Great Firewall).
• To keep your usual apps working, use international roaming on your home number, or a travel eSIM that routes through a foreign network.
• Install WeChat and Alipay before you fly — they’re your lifelines in China (see the payment guide).
• Do everything at home on Wi-Fi first — download apps and save maps before you go, because blocked apps can’t be fetched once you’re inside China.

What the Great Firewall actually is

“Great Firewall” (GFW) is the informal name for China’s national internet-filtering system. At the network level, it blocks or interferes with connections to a long list of foreign websites and apps — including Google, WhatsApp, Instagram, Facebook, X (Twitter), YouTube and many more.

A few things worth knowing so you’re not surprised:

• It only affects traffic that passes through a Chinese network. Roam on your home carrier, or use an eSIM that routes abroad, and your traffic never touches it.
• It’s not a hack or a malware problem — it’s a built-in feature of the local network. You don’t need to “fix” anything; you need to route around it.
• The list changes over time, and enforcement varies by region and carrier. Treat any blocklist as a rough guide, not gospel.
• It doesn’t block everything. Apple services, Microsoft (Outlook, Bing), Amazon and Zoom generally work fine — as do WeChat and Alipay.

The practical upshot: decide before you travel whether you need access to blocked apps. If you do, plan for roaming or a foreign-routed eSIM. If you can live on WeChat and Alipay, a local SIM is much cheaper.

Your data options, compared

Option 1: International roaming (your home SIM)

Keep using your home number and let it roam on a Chinese carrier.

• How it works: your traffic “exits” through your home country before reaching the open internet, so Google, Gmail, WhatsApp and other blocked services usually keep working exactly as they do at home.
• Pros: zero setup, all your apps keep working, and you keep your number for SMS — useful for two-factor codes from your bank and other services.
• Cons: the daily fee adds up fast (often $5–$10/day), and speeds can be throttled after a data cap.
• Best for: short trips under a week, where convenience matters more than cost.

Option 2: A local Chinese SIM

Buy a SIM from China Mobile, China Unicom or China Telecom at the airport or a carrier store.

• How to buy: show your passport — real-name registration is mandatory by law. Airport counters and carrier stores see foreign tourists daily and know the drill; it usually takes 10–20 minutes.
• Pros: the cheapest data by far (often under ¥100 for tens of GB), and you get a local phone number — useful for apps, restaurant queues, food delivery, and the many Wi-Fi logins that send an SMS code.
• Cons: on a Chinese network you’re treated like a local, so Google, WhatsApp and other blocked services stop working.
• Best for: stays of a week or more, or as a cheap second line alongside roaming.

Option 3: A travel eSIM

A data-only eSIM you buy online before you leave and activate on arrival.

• The one thing to check: which network it actually uses. An eSIM that rides a Chinese carrier behaves like a local SIM (blocked services); one that routes through a foreign network keeps your usual apps working. Read the fine print before you pay.
• Pros: no physical SIM swap, set it up at home, usually cheap.
• Cons: data-only — no local phone number. And many travel eSIMs are Chinese-routed by default, which means blocked apps still won’t work.

Wi-Fi in China

Hotels, cafes, airports and malls all have Wi-Fi, but there’s a catch: many public networks ask for a Chinese phone number for SMS verification before you can log in. That’s one more reason a local number helps.

• Hotels are usually the easiest — many hand out a simple password. International chains often route guest Wi-Fi abroad, so Google and WhatsApp may work there; budget and local hotels usually behave like a local connection. Test before you rely on it.
• Cafes and malls often require a Chinese number; without one you may be stuck on mobile data.

Rule of thumb: don’t assume public Wi-Fi will reach Google. Treat local Wi-Fi like a local SIM — expect blocked services, and be pleasantly surprised if a hotel network routes internationally.

What’s blocked (and what isn’t)

On a standard Chinese network (a local SIM or ordinary Wi-Fi), these commonly don’t work:

These generally do work: Apple services (iMessage, FaceTime, Apple Maps), Microsoft (Outlook, Bing), Zoom, Amazon — and, most importantly, WeChat and Alipay.

The blocklist shifts over time and varies by carrier and region. When in doubt, test it yourself on arrival.

Apps to set up before you fly

Because blocked apps can’t be downloaded from inside China, do this at home on Wi-Fi:

• WeChat — messaging, payments and everyday life. Essential.
• Alipay — payments and transport. See the payment guide.
• Apple Maps or an offline map — Google Maps is unreliable in China; Apple Maps works, and an offline map is a good backup.
• A translation app that works offline — Google Translate is blocked on local networks; Apple Translate works, and an offline dictionary is a useful fallback.
• Your airline and hotel apps — plus a copy of your bookings saved offline.

Keeping your usual apps working

The simplest way to keep Google, WhatsApp and friends working is to not run that traffic over a Chinese network: international roaming and foreign-routed eSIMs both work because your data never touches the local filtering.

VPN — the other way to reach blocked apps

A VPN (virtual private network) tunnels your traffic through an encrypted connection to a server outside China. To the Great Firewall, your activity looks like a single connection to that one foreign server instead of visits to Google or WhatsApp — which is why a VPN lets blocked apps work even on a local SIM or local Wi-Fi.

If you decide to use one:

• Set it up before you fly. VPN websites and app stores are frequently unreachable from inside China, so install the app and pay for it at home.
• Expect variable reliability. China actively disrupts VPN traffic, so a given VPN may work on one network or day and not another, and speeds can fluctuate. Pick a reputable provider, and keep a fallback (roaming or an overseas eSIM) in case it stops working mid-trip.
• It doesn’t give you a local number. A VPN changes where your traffic exits, not your SIM — you’ll still want roaming or a local SIM for SMS verification and phone calls.

On the legal side: individual VPN use is a legal grey area in China. Chinese law restricts VPNs that haven’t been officially approved, but enforcement in practice is aimed mainly at people who build or sell VPN access commercially. Short-term tourists using a VPN for personal use are very rarely pursued — but it isn’t formally permitted either, so understand that and decide for yourself. This site doesn’t recommend or link to any specific service.

Common mistakes to avoid

• Assuming Wi-Fi will solve it — most public Wi-Fi is just as blocked as a local SIM.
• Buying a “cheap” eSIM without checking the route — if it rides a Chinese carrier, you’ve paid for a blocked connection.
• Landing without WeChat or Alipay set up — you can’t easily download them once you’re inside.
• Relying on Google Maps — it’s unreliable even where it “works”; use Apple Maps or an offline map instead.
• Forgetting a local number — many Wi-Fi logins and apps need SMS verification.

Pre-trip checklist

• Install WeChat and Alipay, and complete registration
• Download Apple Maps (or an offline map) for China
• Install a translation app that works offline
• Decide your data plan — roaming vs local SIM vs eSIM — and confirm which network your eSIM uses
• Save bookings and important documents offline
• Set up anything you need for blocked apps before you fly

Keeping this page accurate

Connectivity rules and the blocklist change often. We keep this page up to date: the date below shows when it was last checked, and we refresh it whenever something changes. If you spot something outdated, contact us.