Yeah, used that one, too, for a while back on my Desire. But back then, it only worked with a Custom ROM.
Did you use it on stock ROM on the transformer?
Yes, it worked in stock rom.
Did anyone already try to find a working volume booster (for the headphones) app/hack?
I used this on my Transformer Prime https://play.google.com/store/apps/details?id=com.FREE.android.lvh&feature=more_from_developer#?t=W251bGwsMSwxLDEwMiwiY29...
Why will you be upset if a new Prime comes out in 6 months? Will yours stop working?
Sorry, don't mean to make this personal, but seriously, what's the idea here? Should ASUS hold back on developing new products because they're afraid of upsett...