First log in to Apple China official website, and then click "Technical Support", as shown in the figure.
Secondly, select the "Service and Maintenance Information" option in the technical support interface.
Third, then open the "iPhone" to enter.
4. Later, enter the drop-down page and select the option of "View Warranty Status".
Finally, enter the serial number of the mobile phone, so that you can find out whether the mobile phone is refurbished or used.