Thanks Mcbook, I think you're right, it's easier and "less intrusive" like flashing openmode kernel

apparently, openmode kernel lock an ACL folder/file so it's impossible to change lock code that my mail for exchange ask me for every 2-3 month with complex lock code required, so perhaps my phone won't have worked like now after that ...

I've finally installed aegis hack and other relative stuff like coderus trusted repository, debinstall, ... and unrestricted system UI !

My N9 is no near perfect !

just missing a better way to manage network connection,
just missing wifi eap-sim authentication ...