Tools/raw materials:
Apple 12, iOS 14.2.
1. First, open the health code applet on your mobile phone, find it and click to declare again, as shown in the following figure:
2. After entering the edit page, find and click Modify mobile phone number, as shown in the figure below:
3. Secondly, modify the mobile phone number, as shown in the figure below:
4. Finally, check the agreement and click Finish, as shown in the figure below: