Quick answer. Choose your internet connection and bank-verification arrangement separately. A data-only travel eSIM provides internet, not SMS sent to your home number. Keep that number available if your bank needs text verification, and check your device, carrier lock and plan before buying. A mainland SIM normally involves passport registration. Access to services from home depends on the actual connection and provider; the eSIM format alone does not guarantee it. International Services Shanghai — setting up mobile services
References: Apple Support — Dual SIM settings · International Services Shanghai — setting up mobile services
Your phone needs to do a few ordinary things on arrival: find an address, contact your hotel and help you pay. Choose a connection that supports those tasks, then check any services you need from home. Buying mobile data and keeping your usual telephone number available are two separate decisions.
Choose the connection that fits the visit
Roaming with your home carrier keeps the arrangement familiar. Before departure, ask whether mainland China is included, how much data is provided, what happens after the allowance is used and what calls or texts cost. Check the rules for your actual tariff rather than assuming a European roaming allowance applies in China.
Compare ways to get connected
| Option | Best question to ask | Watch for |
|---|---|---|
| Home-carrier roaming | Does my tariff include mainland China? | Data cap, SMS/call charges and roaming settings |
| Overseas travel eSIM | Does this plan work on my exact phone? | Data-only service, activation, hotspot and coverage |
| Local SIM | Do I actually need a mainland number? | Passport registration, physical slot and renewal terms |
A travel eSIM can provide a separate data connection without replacing your home line on a compatible phone. Plans vary in coverage, duration and included services; some provide data only. Apple confirms that worldwide providers offer prepaid data eSIMs for visitors to mainland China. Your phone must support the chosen service and be unlocked to use another carrier. Apple Support — using a travel eSIM
A local SIM may suit someone who specifically needs a mainland number or a longer local plan. Official carrier stores can register a SIM using a passport. Check the package, renewal arrangements and your phone's physical-SIM compatibility before paying.
A mainland carrier eSIM and an overseas travel eSIM are different products. Apple's current guidance says a mainland carrier eSIM cannot be used on an iPhone purchased outside mainland China. An eSIM-only visitor should not assume a local shop can supply the same solution as an overseas travel plan.
Ask what the plan includes
For a short visit where you do not need a mainland number, compare your existing carrier's China roaming offer with a compatible travel-data plan first. If a particular service requires a local number, investigate that requirement before buying a local SIM. Neither a longer stay nor a large data allowance automatically makes a local number necessary.
If you will need your laptop online, confirm hotspot support and test how you will access important files. Keep essential work or travel documents available without depending on one website. Tell anyone expecting a call which contact method you will use during the trip.
Before purchasing, establish:
- Whether the exact phone model and purchase region are supported.
- Whether service starts on installation, purchase or first connection.
- Whether the allowance covers every place in the itinerary, including separate Hong Kong or Macao stays.
- Whether hotspot sharing is allowed and whether speed is reduced after a threshold.
- Whether there is a telephone number, voice service or SMS, rather than data alone.
- How support can be reached if activation fails.
These are questions for the provider of the specific plan. A large data allowance does not answer them.
Prepare for services that work differently
Mainland internet access is restricted. UK government travel advice identifies Google, Facebook, YouTube and X among blocked services and notes licensing requirements for online services such as VPNs. Do not make an untested VPN your only arrival plan. GOV.UK — internet access in China
Some international roaming products route traffic differently from local connections. Ask the provider about the specific services you need, including WhatsApp and Gmail, and the plan's current conditions. A product described as an eSIM does not, by itself, establish which sites will work. Switching from mobile data to hotel Wi-Fi can also change the connection you are using.
Download essential apps and sign in before departure. Keep a locally usable contact method, such as WeChat, available alongside your usual messaging service.
Keep bank verification separate from mobile data
A data-only eSIM does not replace the number receiving your bank's text messages. Ask your home carrier whether that number can receive SMS in China, whether roaming must be enabled at account level and what charges apply. Ask your bank whether an authenticator or in-app approval is available.
On a compatible dual-SIM phone, you may be able to use a travel line for data and retain the home line for calls and messages. Check data switching and roaming settings with the carrier; keeping a second line active may still incur charges.
Choose the two lines on iPhone
Open Cellular Data in Settings
On iPhone, open Settings → Cellular (or Mobile Data), then tap Cellular Data. The row pictured here shows Primary; the next screen lets you choose a line.
Before continuing: Identify your home and travel lines before choosing a data line.
Select your travel data line
Select the line covered by your travel-data plan. Primary and Secondary are example names; your travel line may have a different label. The green Allow Cellular Data Switching toggle is also an example. Confirm charges with both carriers before enabling it.
Before continuing: Keep bank-verification arrangements separate; choosing a data line does not arrange SMS reception.
Once bank messages are arranged, use the Alipay and WeChat Pay setup steps to prepare your wallet.
Test the first essentials after landing
Follow the provider's activation instructions. Then open a web page, locate the hotel and check that your messaging app connects before leaving the terminal. If it does not, use the provider's support route while you still have access to an information desk or another connection.
Keep the hotel's address and number, your arrival instructions and a screenshot of the booking offline. Connectivity should help you move through the first day. Those few saved details let you continue while a connection problem is being resolved.
With your connection ready, practise the tools in the China travel apps and translation guide.
Before you move on
Questions you may still have
Will every eSIM give access to Gmail and WhatsApp?
No universal guarantee follows from the eSIM format. Ask the specific provider about the services you need and its current routing and conditions. Hotel Wi-Fi may behave differently.
Can I replace my home number with a data-only plan?
A data-only plan supplies internet, not the SMS messages sent to your home number. Arrange verification separately.
Should I buy a local number for a short visit?
Only if it serves a need you have confirmed. A compatible travel-data plan or home roaming may be sufficient; check the services you plan to use.
Sources and editorial notes
Limina China compiled this guide from the references below. Route, pacing and preparation suggestions are editorial recommendations; entry, payment and transport conditions come from the named authorities or providers. Follow the conditions for your own documents, account and journey.
- Apple Support — using a travel eSIMDevice compatibility, carrier unlocking and travel-plan conditions. Source review recorded 29 October 2026. Source checked .
- Apple Support — Dual SIM settingsChoose mobile-data and phone-number lines separately on supported iPhones. Source checked .
- International Services Shanghai — setting up mobile servicesPassport registration and official mobile-carrier stores. Source checked .
- GOV.UK — internet access in ChinaInternet restrictions and the need to check applicable local rules. Source checked .
Interface images illustrate documented steps and supplied guide materials. Account prompts, menu labels and supported features can differ. App-version and device details were not recorded for every image; the illustrations do not establish successful account verification, payment or travel.