Hello, my mobile phone is ZTE N8010, and the personalized desktop and desktop themes cannot be found.

The key question is that you clicked "default". Do you know what "default" means? If you don't click Default, the system will let you choose every time you press that key. But after clicking Default, it means that you will choose to start the built-in desktop by default in the future and not start the personalized desktop, so the system will not let you choose later. The solution is to restore factory settings and reinstall the personalized desktop. Just remember not to click Default when pressing that key. As long as you don't click Default, even if you choose your own desktop again, you can press that key again and re-select the personalized desktop. Don't forget to click on the default lookout and accept. Thank you