I also have an iPhone, which I generally carry in my back pocket, if I have one. In the summer it is often in my bag because the pants/shorts I wear in summer often don't have pockets. One of the drawbacks of the iPhone, in my opinion is that they are too large to comfortably fit in my front pants pocket and don't really fit well in belt pouches. I have broken one, but not while wearing it. It slipped out of my hand and dropped on a stone tile floor. I do sometimes miss calls when the phone is in my pocket, but generally because I just didn't hear the ring and I was in a noisy place. However, I love the fact that I have a full QWERTY keyboard available. Texting without it is just too confusing.

My partner has a droid and always uses a belt pouch. She usually takes it out and puts it on the seat in the car, because it is impossible to get it out of the pouch in time to answer while wearing a seat belt. Her one complaint about texting is the word prediction which she sometimes misses until after the text is sent, requiring a second text to correct the confusion. I just don't use word prediction.

So, belt pouches work sometimes. If you are using it for travel, I would cough up the extra bucks for a bluetooth headset since more and more states are requiring "hands free". It would also solve the "getting the phone out of the belt pouch on time" problem.