Begin with your phone
Check that your device is unlocked and supports the particular physical SIM or eSIM product. Country variants of the same phone can differ. Confirm activation, validity start, data allowance and whether it provides a phone number or data only. Compare home-carrier roaming, travel products and a local carrier's official visitor process rather than assuming one works for every phone.
Keep a fallback
Coverage, routing, app access and identity requirements depend on the provider and current terms. Ask directly; do not treat an old guide as a connectivity guarantee. Save hotel addresses, tickets and essential translations offline. Airport Wi-Fi can need a sign-in process, and banking-app recovery may depend on your home phone number. Keep support details outside the connectivity app.
Check before you travel
This is an editorial planning guide, not live operational information. Recheck official reservations, opening notices, fares and entry requirements for your travel dates. Estimates are planning ranges, not bookable prices. Ask China AI for a starting route and request a personalized consultation for complex needs.
Sources & verification
Articles and budgets are planning references. A checked source link does not verify every changing fact. Confirm official notices for your dates.