FIRMWARE
Echo Dot 2nd Gen (2016)
- Fire OS 6.5.7.1 (NS6571/6220) (code 12584504452, bundle com.amazon.biscuit.android.os)
https://d1s31zyz7dcc2d.cloudfront.net/2026/1/17/ec308665-9df5-49b9-997e-d4f058b33af4/update-kindle-biscuit_puffin-NS6571_user_6220_0012584504452.bin