By Off Path Now · Updated
The short answer
Start with two questions: do you need mobile data, and do you also need calls or SMS on a particular number? Compare your home carrier’s China roaming terms with a compatible travel eSIM. If a Chinese mobile number is important, ask a Chinese operator about a suitable local SIM and your handset. There is no single best option for every traveller.
Last checked: 7 November 2026. Follow the current instructions for your exact device, carrier and package; the examples below are not a product endorsement.
1. Check the actual phone
Find the device’s exact model and purchase region before paying for an eSIM. Samsung notes that support varies by device, software, carrier and region. On iPhone, Apple requires an unlocked device for another carrier’s service. Confirm both compatibility and network-lock status rather than relying on a general ‘eSIM-ready’ label.
- Ask whether your exact handset can use the proposed package in mainland China.
- If your phone is eSIM-only, ask specifically about local Chinese carrier support; do not assume a physical-SIM offer can be substituted.
2. Protect access to your usual number
A data-only travel eSIM does not supply ordinary phone calls, SMS or a phone number; other packages may include them. Read the package type. Keep access to the number linked to accounts you expect to use. Do not remove your home SIM before deciding how you will receive any required verification codes.
Ask your home carrier what it charges for incoming SMS, incoming calls and voicemail in China, and what triggers a roaming day pass. Keeping a line active can incur charges even with its data roaming disabled.
- Write down which line is for mobile data and which number receives account messages.
- Set up important accounts before departure; do not depend on the airport as your first registration attempt.
3. Read the package, not just the headline
Before purchasing, record the answers below. A low starting price tells you little without a coverage area, usable allowance and expiry rule. If the description leaves something unclear, ask the provider before payment.
- Does coverage explicitly include mainland China, and any Hong Kong or Macao stop on your route?
- Is the allowance total or daily, and what happens after it is used?
- Are hotspot use, voice and SMS included?
- When does validity begin, and is there a deadline for first activation?
- How can you contact support if mobile data is not working?
4. Separate installation from the validity clock
Airalo’s current help explains that some packages begin their validity on installation, while many begin when they connect to a supported network. Other providers have their own terms. Read your package’s rule before installing; save the instructions and support contact somewhere you can access without that connection.
- Use a stable internet connection for setup and follow the provider’s installation method.
- Label the lines clearly. Check which line is selected for data and follow that package’s roaming instructions; the home line may need different settings.
5. Buying a local SIM in China
China’s official guidance allows foreign nationals to apply in person at an operator’s own service hall with a valid passport or Foreign Permanent Resident ID Card. Real-name registration is required. Ask the operator to confirm handset compatibility, the included services and the published tariff before completing the purchase.
Apple’s current guidance distinguishes international travel eSIMs from mainland-carrier eSIMs: it says a mainland Chinese carrier’s eSIM cannot be used on an iPhone bought outside mainland China. Check this distinction before choosing a local offer.
- Bring the original valid identity document and allow time for the in-person process.
- Ask how to top up, end the service and cancel the number when it is no longer needed.
6. Test the connection before leaving the airport
Once your chosen service is active, briefly disconnect from Wi-Fi to check that mobile data works. Confirm that an essential app opens, and test receiving a message on the number you intend to retain. Website and app availability can differ between services; confirm anything essential with your provider rather than assuming universal access.
Keep the hotel’s address in Chinese, booking details and an agreed contact method saved offline. These are useful backups when changing networks or moving between places.
- Check the active data line, remaining allowance and validity end date.
- If something fails, use the provider’s support instructions before deleting or repeatedly reinstalling the eSIM.
Continue preparing for China
Next, read our Alipay setup guide and 12306 train-ticket guide. If you are planning a private journey, share your dates and route, including how you expect to stay in contact. Connectivity is one preparation within the wider trip, not a substitute for confirming its arrangements.
Sources and current instructions
Apple Support — Using a travel eSIM internationally
Samsung Support — SIM and eSIM on Galaxy devices
Airalo Help — Calls, texts and data-only plans
Airalo Help — Installation and validity policy
Tianjin Communications Administration — SIM services for foreign nationals (2026)
National Immigration Administration — Telecommunications
Airalo Help — Roaming charges on the home line
Cover photograph: Off Path Now — Nanluoguxiang, Beijing.