hey there, just to let people that are having this problem know there are others with the same issue. I'm looking for a fix since Verizon won't take the phone back.. I searched all over the internet and there are many others that immediately figured this to be a hardware issue and returned their phones.
I wiped everything and tried different versions of rooting along with radio install many, many times.. manual root, etc. Every time I go to 2.15 radio it loses the internal speaker (speakerphone still works).
Is it possible it is a hardware difference in these particular phones that doesn't work with Froyo? Or something hard coded? It should have worked by now if it was only missing files or from an improper install. I really have nothing else left to try, I started from scratch using every different combination of methods I have found and no luck re-downloaded all files, reformatted my card, etc. 3 days wasted on this, p@sssssd.
2.2 + Root: No audio from internal speaker on phone - Android Forums