This firmware is for Ugoos SK1 TV Box 8/128 GB with AMLogic S928X-K as CPU. You can buy Ugoos SK1 TV Box from Aliexpress.com for a very good price.

Download Android 11 Stock firmware v.1.3.8 for Ugoos SK1 TV Box from here. Download Amlogic USB Burning Tool v3.2.0 from here or download Amlogic Burn_Card_Maker v2.0.2 from here.
Firmware details
Archive name: SK1_1.3.8
Image: SK1_1.3.8.img
Archive file size: 738 MB
Model: Ugoos SK1 8/128 GB TV Box
Platform: AMLogic S928X-K
System: Android version 11
Changelog for v.1.3.8
1. Added some expert video picture settings: AI, super scaling, noise reduction
2. Fixed manual audio format settings
3. Fixed some issues with high-resolution audio playback
4. Fixed audio mode information for hardware monitor
5. Allowed E-AC3 passthrough for S/PDIF
6. Fixed HLG for VP9
7. Hide AOSP keyboard when pressing DPAD_UP button
8. Fixed wake-up issue with BT remote
9. Fixed connection loss issue with UR02
10. Fixed color mode error for non-DV content (SK1)
11. Some other system changes.
Caution Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.
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