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I also saw a reference to /mnt/us/system/release_notes and /etc/releasenotes_url.txt in the PW2 5.7.2 firmware, by dumping `strings usr/bin/otav3`.
As well as threats to abort the update download -- those release notes might be needed to find the availability of updates.
Possibly some more things that can be modified or locked to interfere with the OTA sensing capabilities?
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