Choose a connection for the tasks you need
For travel in mainland China, compare home-carrier roaming, a compatible travel data eSIM and a local mobile service. The right choice depends on your exact phone, whether you need calls or SMS, when you can activate the service and what you will do if it fails.
Keep three questions separate: Will the phone connect? Will I have the number or messages I need? Will the services I rely on be accessible? A plan that answers one may not answer the others.
Source text was reviewed on 18 October 2026. This guide has not bought plans, measured speed or tested access from a particular network.
Compare the arrangements before comparing prices
| Option | Useful when… | Confirm before paying |
|---|---|---|
| Home-carrier roaming | You want to investigate keeping your existing line for the trip | Mainland coverage, activation, included data, calls/SMS charges and limits |
| A travel data eSIM | Your phone supports the specific plan and a data-focused service fits your needs | Exact device compatibility, carrier lock, coverage, activation deadline, validity start, hotspot and support |
| Local physical SIM | Your phone accepts a compatible physical SIM and you want to investigate a local number | Passport registration, device compatibility, included services, duration and cancellation/top-up terms |
| Local carrier eSIM | Your exact device qualifies for that carrier’s mainland service | Supported model and market version, in-store identity check and activation conditions |
| Wi-Fi | You need a supplementary connection | How to sign in, any SMS requirement and a fallback away from that location |
These are decision prompts, not package specifications. Request the provider’s terms for the particular plan; a destination label alone does not answer whether it has voice, SMS or a local number.
Check the device, especially for eSIM
Apple distinguishes worldwide travel eSIM plans from eSIMs supplied by mainland carriers. For iPhones, carrier lock and the exact model/market version matter. Mainland carrier activation has its own supported-device and store-verification requirements.
Check your model number against the current manufacturer guidance and ask the provider to confirm the exact plan. “Supports eSIM” on a phone specification is not enough to establish compatibility with every local service. Android users should use their own manufacturer’s and carrier’s documentation rather than applying Apple’s instructions.
For a physical local SIM, Shanghai’s mobile-service guide describes obtaining and registering one at major carrier stores with a passport. Bring your original document and ask the store what is required for the plan you select. The guide’s separate online seller process is not a universal document checklist for all providers.
Test data, messages and calls separately
Ask the provider what the plan actually includes, then check the services you need: opening a map, receiving a required verification message and making or receiving a call if calls are part of your arrangement. A data-only result does not demonstrate that a phone number or SMS function exists.
The Tianjin communications authority guide describes applying in person with a valid document at a carrier-operated store and flags device compatibility, including 5G or VoLTE. This is local guidance, so confirm the procedure and handset support with your chosen provider. Shanghai’s English mobile-service guide also describes passport registration at stores.
For an iPhone, compare the exact model with Apple’s Chinese mainland eSIM guidance and English version. Local-carrier eSIM support and a worldwide travel-data plan are different checks. Do not buy a new phone merely because a salesperson or general travel list says an eSIM is essential; first establish what your existing device can use.
Keep account verification reachable
List the accounts that may send a message to your existing number: a payment wallet, bank, booking service or email account. Ask your home carrier about receiving those messages abroad and associated charges before changing lines.
If using two lines, label them clearly and select the intended line for mobile data. Check the settings for automatic data switching and roaming with your provider’s instructions. Do not delete an existing eSIM until you know how it can be restored.
Do not make every essential depend on one online service
The FCDO’s internet-access guidance notes that some online services are blocked in mainland China. A working connection therefore does not guarantee access to the services you use at home. This page does not promise that roaming or any travel eSIM will provide particular access.
Before departure, prepare maps, payment and booking access and save the hotel name, Chinese address, reservation and arrival plan offline. This is a document fallback, not a claim that a map app offers offline navigation.
After activation, check the selected data line, open a necessary service and confirm the expected allowance in the provider’s account. If it does not work, use official support and the actual error before buying a second plan. In the meantime, use the saved address and the arrival-help options.