problem w phone calls.

[crenita]

I don't know if one of you smart guys can help me.. I received a call today and had 3 bar's so good reception. I phone cut out 3 times.. It seemed as though if it touched my cheek it was activating something. Is there a setting or screen setting I need to use to prevent that action. I am a new user so this was really annoying I finally had to just put it on speaker to keep the call on and not drop again..

I am worried as I can't figure this out .. HELP