chose? Hi i am buying my fist phone and i like the w580i a lot but i don't know because of the keys cracking? i will not text to much or anything so do you think they will still crack?? and how about the blackberry 8100 is it better?? and if i buy it unlocked can i just put in my sim card (prepaid) and will it work??? witch one is better to buy??? please help i will get it prepaid and will not be texting a lot.