1. Search for "PP Assistant" in the built-in browser of the Apple phone, and then click Install

2. After PP Assistant is installed, open it directly on the desktop and it will appear This prompt means that PP Assistant cannot be opened

3. Open Settings, find General there, and then open it

4. Open "Description File and Device Management"

5. Select the description file corresponding to PP Assistant and click to open

6. Click to trust the description file of PP Assistant

7. At this time, PP Assistant can be opened normally. Then search for "Thunder" in the search box and click download.

8. Wait for the installation to be successful before you can use Thunder on your iPhone.