Ok, sorry for the confusion. I just managed to uninstall the CAB, get it back to normal, and retry installing the CAB.

When I reinstalled the CAB, it went back to the "fixed" mode where the earpiece is nice and loud... but the speakerphone is non existent. I also read another post on here (I think it was on page 11) where someone was experiencing the same issue.

So, I was able to repeat the error perfectly after reinstalling. Any ideas?