My note 3 freezes a lot and doesn't play videos or music

Yes it was fixed :D

First you should know I have had already tried installing a different lite rom that made the phone just a little more usable but still broken. I tried restoring a backup that I knew was working , I tried reinstalling all the different versions of the official firmware, I tried giving it to a repair shop that tried to use a Box to flash a firmware but all that didn't work.

Until one time the phone asked for OTA update and I thought I should try it anyway. I didn't expect the problem to be fixed at all but it was.

I guess the problem might have been with knox security software that could only be fixed with an update that had a different version.

By the way before it asked for the updates someone tried flashing a firmware using a Box (but ut didn't work until OTA update was installed)

The firmware version that fixed it was N9005XXUFNF2

You can contact me if you have any questions at moustafaatchy@gmail.com

I hope yours gets fixed too