FlexRadio FLEX-6400
firmware v3.4.21
FlexRadio · Released Feb 13, 2023 · First seen Sep 6, 2026
Source:
flexradio.com
v3.4.21 is not the latest firmware for the FlexRadio FLEX-6400: the current version is v4.3.16 (October 13, 2026). Go to v4.3.16
What's in this update
Release notes not published by vendor — see official page. Check FlexRadio's website for the full details of what this update changes.
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