Yep, The problem is due to Apple choosing not to include the chip that enables this functionality.
I have lost track of the times I used to fire up Yelp/other app on my phone to look something up while talking with someone. This is a real world need and Apple failed big time on this.
So much for their "functionality, not specs" argument. IOS and Apple phones imho have worse UI/UX than Android 4.0+