Option 1: use your home operator’s roaming
Ask your operator whether the plan covers mainland China, what allowance it includes and what happens when it runs out. Check calls and incoming verification messages as well as mobile data.
Roaming can be convenient for a short visit because you keep your existing number. Set the intended data line and roaming settings carefully, especially on a dual-SIM phone, to avoid using an expensive plan by mistake.
Option 2: buy a travel eSIM
Check the phone model, where it was sold, carrier lock and the provider’s compatibility list. Two phones with similar names can support different SIM options. An eSIM-only handset also needs a plan it can activate.
Read the validity start rule, mainland coverage, data allowance, speed policy, hotspot use and top-up terms. Some travel plans provide data without a local number, calls or SMS. Keep installation instructions available on another screen or on paper.
Option 3: buy a local SIM
Bring your passport to an operator’s own service office or an authorized airport counter. China Mobile, China Unicom and China Telecom offer mobile services. Ask staff to check your handset and explain the plan before paying.
Ask what happens when the allowance ends, how to recharge, whether the number can receive messages needed by your apps, and how to close or stop a recurring service. Keep the service receipt and account details.
Test the services you will use
Google services and several familiar social and messaging services are blocked on mainland Chinese networks. Do not rely on hotel Wi-Fi or a local SIM to reach them. Install local travel tools before you fly and save important addresses and bookings offline.
Access on international roaming or a travel eSIM depends on the provider and plan. Before buying, ask whether the services you need are supported. Set up another way to contact your family and travel companions, and keep your verification phone number reachable.
Keep a useful offline backup
Download hotel addresses in Chinese, booking references and the next transfer instructions. Store emergency contacts separately from the phone. Carry a charging cable and a power bank suitable for your transport arrangements.
Keep your home number available if your bank or booking account sends security messages there. A working data connection does not automatically mean that number can receive SMS.
Common questions
Will every eSIM work on my phone?
No. Compatibility depends on the exact handset, region, carrier lock and plan. Check before buying.
Do I need a Chinese phone number?
It can help with some local services, but the need depends on the apps and bookings you use. Check those requirements before choosing a data-only plan.
Will Google, WhatsApp and Instagram work on hotel Wi-Fi?
These services are restricted on mainland Chinese networks. Prepare another way to navigate and communicate. Ask your roaming or eSIM provider about the services supported by its particular plan.