Motorola Droid

Love the phone but have the following issues..

1. While on a call, the phone randomly vibrates and then goes into mute mode-I have to hang up on caller, or they hang up on me because they can't hear me.
2. Phone completely shuts off - I have to remove the battery in order to get it to reset.
3. When ending a call, the phone screen stays black and I have no way of ending the call.

Does anyone else have these issues?