Which phone is best? Screen size is going to be a big factor. Big screens are more comfy for reading, small screens are more comfy for holding and tapping. Is the iPhone 5 a happy medium? Andy Ihnatko Photo

The new iPhone 5, left, and the iPhone 4S are shown at the AT&T Mobility store, Friday, Sept. 21, 2012, in Fredericksburg, Va. (AP Photo/The Free Lance-Star, Robert A. Martin)

Apple CEO Tim Cook speaks in front of an image of the iPhone 5 during an Apple event in San Francisco, Wednesday, Sept. 12, 2012. (AP Photo/Jeff Chiu)

Phil Schiller, Apple's senior vice president of worldwide marketing, speaks about iSight in the iPhone 5 during an Apple event in San Francisco, Wednesday, Sept. 12, 2012. (AP Photo/Jeff Chiu)

Hazem Sayed, 54, the first in line to purchase the new iPhone 5, holds up his new phone in front of media outside the Fifth Avenue Apple store, Friday, Sept. 21, 2012, in New York. Hundreds of people waited in line through the early morning to be among the first to get their hands on the highly anticipated phone. (AP Photo/John Minchillo)

A customer cheers with staff members of Apple Inc. as the Apple store in Hong Kong started selling iPhone 5 Friday, Sept. 21, 2012. Apple's Asian fans jammed the tech juggernaut's shops in Australia, Hong Kong, Japan and Singapore to pick up the latest version of its iPhone. (AP Photo/Kin Cheung)

Phil Schiller, Apple's senior vice president of worldwide marketing, speaks on stage during an introduction of the new iPhone 5 at an Apple event in San Francisco, Wednesday Sept. 12, 2012. (AP Photo/Eric Risberg)

How the iPhone 5 (left) compares to the iPhone 4S: It’s an ounce lighter and a few millimeters thinner. | Nati Harnik~AP

The new Lightning dock connector (left) solves a lot of technical problems for Apple. And it's easier to use. Existing iPhone owners should just beware of the expense of replacing old cables and docks. Andy Ihnatko Photo