The big upgrades with the iPhone 4S are internal. The iPhone 4 wasn't a slow device; in fact, it felt faster than most rival smartphones with much faster processors, thanks to Apple's complete top-to-bottom control over the operating system, including the user interface. But the iPhone 4S is much quicker than the iPhone 4 with most tasks, and it offers up to seven times the graphics performance of the iPhone 4. Apps now open instantly, the Web is even speedier, and gaming has a notable performance increase.

Apple touts the 4S as is the first smartphone to incorporate two antennas and the ability to switch between them even while on a phone call. Plus, it's a true world phone for Verizon and newcomer Sprint, which for the first time is offering the iPhone 4S and the previous-generation iPhone 4. In short: Apple took the best smartphone, from a hardware and design perspective, and made it even better.

Last updated October 18 2011: 10:28 AM ET
Join the Conversation
Market indexes are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer Morningstar: © 2014 Morningstar, Inc. All Rights Reserved. Disclaimer The Dow Jones IndexesSM are proprietary to and distributed by Dow Jones & Company, Inc. and have been licensed for use. All content of the Dow Jones IndexesSM © 2014 is proprietary to Dow Jones & Company, Inc. Chicago Mercantile Association. The market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. FactSet Research Systems Inc. 2014. All rights reserved. Most stock quote data provided by BATS.