facing some issues to firmwareupgrade/downgrade of several 7921G Phones via USB.
I can upgrade downgrade phone to different software versions (1.3.4, 1.3.4Sr1, 1.4.1). I have downloaded the 1.3.3.tar several times same error.
Only up/downgrade to 1.3.3 fails "error in browser" "error in uploaded image"!!
Does anybody know why und how to solve this problem?