Since you provided a title but no content, I have written a short story based on that premise.

To use STB Upgrade Ver 4.0.2, you generally need the following hardware and software steps:

INSTALLING...

Quick Recap Checklist:

• [ ] Backup your current STB settings.
• [ ] Download Ver 4.0.2 from Play Store or APKMirror.
• [ ] Install and restore configuration.
• [ ] Adjust decoder to Software if you experience a black screen.
• [ ] Increase buffer size to Large for smooth 4K playback.

Post-Update Configuration: