Device firmware summary
FTVDB catalogs 20 public firmware records for Echo Flex (2019). The device is identified
by model AEOCR and by firmware package
com.amazon.croissant.android.os. These identifiers help distinguish hardware that may have
similar retail names but receives a different firmware line.
The catalog currently spans Jul 28, 2021 through Jul 3, 2026. The latest version in the ordered list is
Fire OS 6.5.7.3 (NS6573/7595), with build code 13054618500 and a recorded date of Jul 3, 2026.
Compare the version label, numeric build code, and recorded date in the table below. Recorded dates describe the public source metadata in this catalog and are not an installation recommendation or a guarantee that an update applies to every device.