Root Weird bugs

I recently sold my phone, I had it rooted and had clockworkmod installed and everything. I was rushing because the guy was on his way so I threw a new ROM on it (Hellfire 2.3 I believe) and deleted all the other files on the sd card (cwm, data, dcim, media, etc.) so no files were left on it. When I took the sim card out the phone would freeze and not respond. I put it back in and gave it to him. He called me back saying the volume doesn't work and when he tried to call he cant hear the other person and related bugs like that.. Any help ?