I've learned that you can not answer the phone if the hard case is covering the screen. Somehow it doesn't feel the touch!! And you also can't answer the phone if you have the headphone jack on it to play through the radio. Now they can hear you but you can't hear them.
Every day it's a new adventure with the iPhone but I love it.
I've now gotten organized and have all my contacts with their phone numbers, addresses AND birthdays. Maybe I won't forget birthdays now! But I won't hold my breath, I'll turn into a smurf.