Earlier this year, I bought a iPhone 4. Not the 4s that came out a couple of weeks ago.

This fall, while traveling, I suddenly discovered a zoom feature on the camera. I took numerous pics using that feature. I have several pics taken from one location ... close-in, far-away, etc. I have no idea how I got the feature to appear on the screen.

Now, I can't get it to work. I went to an Apple store this week, and none of the geeks knew anything about a zoom feature.

Any help???