A Chinese SIM card is basically a second ID — here’s why that helps you

In most countries, a phone number is a way to reach you. In China, it is a way to prove you are you. Locals use their number to log into everything, sign up for everything, collect tickets, receive deliveries, register at hospitals, book museums. Ask a Chinese person for their "ID" in daily digital life and functionally, it’s their phone number.

Once you see this, the frustrations foreigners hit — apps rejecting foreign numbers, mini-programs demanding SMS codes, bookings that stall at the phone field — stop looking like bugs. They’re the system working as designed, and there’s a specific reason it was designed this way.

Why China locked numbers to identity

Every Chinese SIM is real-name registered: bought with an ID document (passport, for foreigners), photographed and verified at purchase. This has been mandatory nationwide since 2013-2017, and enforcement is strict.

The driving reason is fraud. China fights an enormous, industrialized telephone- and internet-scam problem, and anonymous phone numbers were the scammers’ basic tool. Tying every number to a verified human — and aggressively shutting down numbers with suspicious patterns — is the core countermeasure. That’s also why you can’t buy a burner SIM at a kiosk, why numbers idle too long get recycled, and why an SMS code is treated as proof of presence in a way email never is.

The practical consequence: because every number is a verified identity, every service is happy to hang verification off it. The phone number became the master key.

Why eSIMs don’t fill the gap

Travel eSIMs give you data through roaming — useful, but they come with a foreign number, which unlocks nothing locally. And domestically, eSIM barely exists in China: mainland carriers restrict phone eSIM to a handful of recent device models, and the overwhelming norm remains a physical SIM. Nobody builds services assuming eSIM, because almost nobody has one.

What a real-name +86 number actually unlocks:

• Ride-hailing — DiDi registration requires one.
• Mini-programs — the WeChat/Alipay mini-apps where museum tickets, restaurant queues, attraction bookings and train-station pickups live almost all verify by +86 SMS.
• Deliveries and takeout — the courier calls you; the locker texts you.
• Memberships, discounts, hospital registration, hotel Wi-Fi — the number is the account.

For the deeper dive on the eSIM-vs-number problem, read why your travel eSIM won’t be enough.

What to do about it

Get a real Chinese SIM with your passport — airport carrier counters do it on arrival, or arrange it before you fly. It’s legal, normal, and the single highest-leverage piece of setup a China traveler can do: with a +86 number, you stop being locked out of the mini-program layer where modern China actually operates.

KORA’s Survival Kit is built around exactly this — a real +86 SIM with a data plan, handed over and fully set up by a human at the Shanghai Pudong or Beijing Capital airport counter, with payments and essential apps configured in the same sitting. Plans and reservation at koracn.com/#/pack.