Compare what each connection option gives you
| Option | Questions to ask before choosing |
|---|---|
| Your existing provider’s roaming | Does the plan cover mainland China, and how do calls, data and incoming messages work? |
| A travel SIM or eSIM | Is your exact phone compatible, when does validity begin, and does the plan include a number or only data? |
| A local mobile service | What identification and activation steps are required, and is the plan suitable for your length of stay? |
| Accommodation Wi-Fi | How do you sign in, and what will you use when away from the property? |
Check your exact device before buying
SIM and eSIM support depends on the device, where it was purchased and the provider. For an iPhone, Apple also advises checking whether it is locked to a carrier before using another network. Read the guidance for your exact model instead of relying on the word “eSIM” in an advertisement.
Before paying for a plan, note the activation method, validity start, covered destinations, data allowance and help channel. Save the instructions somewhere you can reach if the phone is temporarily offline.
Keep access to verification messages
The number used for banking, email and travel apps may still be needed after you switch your data connection. Check with your existing provider how to keep receiving the messages you need, and understand its roaming settings.
Label the lines clearly if you use two SIMs. Decide which line handles data and which remains available for your existing number. Do not remove an essential login method before checking that your accounts can still be accessed.
Know what a local SIM requires
Chinese government guidance directs foreign visitors to telecom operators’ service offices with a passport or other accepted identity document to apply for a local SIM. Check the current requirements and available plan with the operator.
At setup, confirm whether you can make calls, receive messages and use data. Ask how to check the remaining allowance and the plan’s end date. Keep any account or activation reference so that a later question can be handled by the same provider.
Agree a contact method that works on your connection
Some overseas websites and services are restricted in mainland China. Do not assume every app you use at home will be available on every connection. Check the services relevant to your trip and agree an alternative way to reach your accommodation and any arranged travel contacts.
Save full phone numbers, Chinese addresses and meeting instructions. A screenshot of a meeting point is often easier to show than a message buried in a long conversation.
Build a small offline travel folder
- Latest itinerary and transport booking references.
- Hotel names and addresses in Chinese.
- Airport or station meeting points, including the correct exit.
- Accommodation and agreed journey contacts.
- Provider instructions and account-recovery information stored securely.
Keep a second copy on another device or on paper for the essential items. Charge before a long transfer and test that downloaded files really open without a connection. This backup remains useful even when your mobile service works well.
Official information
Reviewed on October 3, 2026
