Reception. Where's the internal antenna located so I can amplify it?

I make phone calls from a basement. My previous phone, a kyocera kx160, worked fine most of the time with the occasional interference or call drop, so the signal isn't super weak. However, after the demise of the kyocera kx160, a friend provided a nearly new kyocera m1000 "wildcard" phone. In the same environment, this phone has a great deal of difficulty keeping a call going. I thought I'd attempt one of those "as seen on TV" stick on signal amplifiers, which, in theory, I'd want to put as directly over the antenna as possible. At the same time, I'm using a booster to get the signal through my window from outside (it's designed to improve calls made from within cars).

1) Where, exactly, would the antenna be in this phone?
2) Any other ideas?

Thanks!!!

James