Phone [Q] AV sync issues Allshare hub + n9005. How to upgrade the firmware?


I just got my Allshare cast hub dongle thing and any video is way out of sync when played on my TV. I noticed there is a firmware upgrade for the hub, but the firmware updater is not available for the n9005. Anybody succeded in upgrading the firmware whilst on the n9005?
(and yes i already tried the usual suspects, restore to factory etc etc)