Motorola RAZR V3
Razr won't ring when plugged in
Check to see if your "Loud" audion profile (Settings/Audio/Change/Style/Loud - Select/Loud Details - Change) has a ring volume above zero, and has a ring tone associated with Calls. I have mine on Vibe Dot Dash in Loud (I use my "Loud" as "Silent," because in "Silent" it won't even vibrate), so mine doesn't ring but it does vibrate when plugged in.
HTH!