Unicom users can edit the last four digits of the certificate number corresponding to CXMYD# mobile phone number or reply to the last four digits of the certificate number corresponding to 598# mobile phone number, and query the roaming information of the whole country in the past 14 days. Roaming information is for reference only, not as the final judgment basis.
Users who register with the group business license need to send the last four digits of the business license number corresponding to the mobile phone number to 100 10 for normal inquiry. (The last four digits of the business license, if not clear, please consult your subordinate unit)