How to check firmware (SYS version) and UI version
1. Go to System>System and Updates
2. View current system version

Note: Make sure the system version and UI version match
| UI & SYS Match Checklist |
| UI | Link | SYS | Link |
| 3.8 | Download | 4.6 | OTA |
| 3.7 | NA | 4.5 | OTA |
| 3.6 | NA | 4.4 | OTA |
| 3.5 | NA | 4.3 | OTA |
| 3.4 | NA | 4.2 | OTA
|
To update the firmware and UI, please refer to the articles: