FIRMWARE
Fire TV Stick 4K - 1st Gen (2018)
- Fire OS 6.7.1.1 (NS6711/5908) (code 11644900484, bundle com.amazon.mantis.android.os)
https://d1s31zyz7dcc2d.cloudfront.net/2026/3/23/9eb394a9-f384-4afe-a93d-f87c4cf85d1d/update-kindle-mantis-NS6711_user_5908_0011644900484.bin