A lost SIM can affect bank, wallet and ticket access together. Establish the registered holder and receiving office before replacement; buying another number does not secure accounts linked to the lost line.
What to have ready
Before you start
China Mobile's published cross-region replacement page specifies a second-generation mainland resident identity card and service password. It does not establish same-day replacement anywhere for a travel-permit or passport holder. Ask your operator and the number's home region about the process for your actual document, including a designated outlet or additional verification. Suspension, replacement retaining the number and buying a new number are different actions. Confirm ongoing charges and reactivation separately.
What to do, step by step
- Report the loss through verified operator support from a trusted device. Record acceptance time and the services restricted; secure device accounts too if the whole phone is missing.
- Tell important banks and wallets that SMS access is unavailable and ask about restrictions and personal alternative verification. Preserve any unrecognised transactions instead of waiting for a replacement SIM to investigate them.
- State whether you hold a Chinese permit, non-Chinese permit or passport and confirm the replacement outlet, originals, fee and attendance requirement. Travel to the counter only after receiving document-specific guidance.
- After replacement, test calls and messages on the retained number and confirm the old SIM is disabled. Restore linked accounts individually; if the number changed, update each institution through its formal process.
Costs, timing, and things to check
Do not give an agent account passwords or bank codes. Keep the support reference, and ask for formal clarification when counter advice differs instead of repeatedly changing identity details to pass an online form.
If the old SIM turns up, confirm its status before reuse. Replacement does not settle arrears, contractual commitments or number-retention charges, which require their own account checks.
A practical example
A Hong Kong resident loses a Guangdong SIM while in Shanghai. A local outlet only supports mainland identity cards for cross-region replacement. The traveller retains the loss-report confirmation, asks Guangdong support for a permit-compatible outlet and separately secures the bank account. Failure at that particular counter does not prove the number is unrecoverable, and another person's registered SIM would not solve the original account-security problem.
Restrict the lost line and secure accounts, then locate a replacement route that accepts your actual document.
Official information and enquiries
These are the reference and service entry points for this guide. Check current fees, eligibility, and schedules with the authority. The preparation date is not each source's official update date.