I have a question about the iPhone's web browser. in web pages, when a phone number appears, the iphone recognizes it and places a button there to call that number. but how does the iPhone recognize a phone number? i am taking a web development class and i want the iPhone to recognize this number. is that done in html? what i want to do is put a phone number in tags such that when viewed through the iphone browser, there is a call button there. any insight into this?