HTC Touch (CDMA) / XV6900

I have had the xv6900 for a couple of weeks now. I'm having a couple of issues that I can't seem to fix. First, when I get an incoming call, only a small part of the number will show up and I can't see the person's name at all. I read a thread that said I could reset the phone when this happens, but who wants to reset it every time?! Also, when I am talking on the phone my cheek tends to push the buttons. Is there a way to lock it when on the phone? I used to have a Treo and it had a lock function for when you are on the phone.