i've been trying to upgrade to Firmware v20.175 but can't, tried reinstalling NSU and everything, even tried using another pc also failed, the failed update msg appears after finishing download the 130+ MB of update. Anyone faces the same problem too? What's the solution workaround?

hey, my n85 wifi detection damn lousy, need to put very near to the router only can detect the network.. so wanna ask is this a hardware problem or a software problem? how to fix it?