its more exposed, clearly it was an aesthetic choice, (good or bad, that's debateable, I just have a clear piece of vinyl covering it) but if you're gunna cover it with a case of some sort, plastic and rubber are better choices for RF than aluminum. Also despite what has been said about the antenna, I can only speak for myself. For me it catches RF signals way better than my 3GS in certain areas, and it holds on to calls better with fewer bars, being an exposed antenna. Is it more finicky? Maybe, but that's just because we're all trained to look at a set of bars as a basis for what is a good or bad reception, and its a natural instinct to go and say "ugh i have 2 bars my reception stinks" 2 bars are more than enough to make a call in some instances.