It is hard for me to say this since I love the iPhone touch interface in general, but I am leaning towards a conclusion that Apple had made the phone operations a bit more complicated that it should be. 1) Holding the phone with the left hand and dialing with touch with that hand introduces quite a few errors for me. 2) It is hard to dial without constantly focussing the attention on the screen. With button based key pads, my fingers are trained to move with only partial attention paid to the keypad. 3) Answering the phone with the slide is quite difficult for me to do with one hand. It takes a few tries to slide it all the way. 4) To make a phone call, there are just way too many steps depending on what I have done before. e.g If I was in some non-phone function before, here is what I have to do: a) press the home to light up the screen b) slide to unlock c) press home again to get to the menu screen d) press phone e) press the key pad button 5) This may just be me. With the key pad, after dialing the digits, I pressed Call. But I slide over the set of buttons just below the call like "recents" and it goes to that screen. When this happened first, I thought it is making the phone call. When it did not happen, not knowing what is going on, I hit the menu button and then the phone button it still got me back to the "recents" screen. It was all very confusing. I figured out what was going on for sure in a few seconds. I had to touch the keypad again and then touch "Call". 6) The above thing happens 10% of the time for me which seems to be a high ratio of mis-touch/fat finger. I think it can use some smarts there in terms of lesser sensitivity to touch of those bottom buttons as opposed to the Call button when it knows I am in the process of making a phone call. 7) The above situation happened to someone who is not familiar with the iPhone and they did not know what was going on/how to make the darn call. Making phone calls should not be this tough. This darn thing is supposed to be idiot-proof, more than ordinary cell phones. 8) While in contacts, when you touch a person's name I would intuitively expect it to make the phone call for contacts that had only one phone number. Instead, it put me on another screen. It was not clear what to do at that point to make the call. Of course, a few seconds later I figured out I had to touch the phone number again to make the phone call. Some of these are minor annoyances but when put together, it gives the impression that the phone operations seems to be quite invovled than an ordinary non-smart phone. It is still much better than other smart phones where the plethora of buttons and icons is awful and intimidating but for just phone operations Apple can iron out some of these from a UI point of view.