FIRMWARE
Fire TV Stick 4K - 2nd Gen (2023)
- Fire OS 8.1.6.6 (RS8166/3482) (code 30736751236, bundle com.amazon.karat.android.os)
https://d1s31zyz7dcc2d.cloudfront.net/2026/2/25/ee2d8058-44d8-4716-a0cb-d66b33d2f0d7/update-kindle-karat-RS8166_user_3482_0030736751236.bin