I do. Detailed operation steps:
< br >
1. Open the desktop Settings.
< br >
2. Find the system in Settings.
< br >
3. Then click System Navigation.
< br >
4. Then pull down to the bottom, you can see the switch of floating ball.
< br >
5. The penultimate column is the system navigation key position change.
< br >
6. The first column is the waist button that integrates the functions of the three keys, which is somewhat similar to Meizu's mback.
You can buy that magnetic charge online. Mobile phones now have this feature.