Whether or not it's legal in your state to hold a handset while driving, we can all agree that doing so isn't too smart. But the alternative--relying on your phone's chintzy speakerphone--isn't much better: Sound quality on your end is awful, and the same goes for the person on the other end. Similarly, unless you're sitting at your desk and focusing entirely on your phone, chances are you'd rather have both of your hands free during calls.
Phone Accessories - News, Features, and Slideshows
Each time Apple introduces a new iPhone model, we get many questions about compatiblity: Will the accessories you already own--cases, speakers, chargers, and the like--work with the new model? In some years, such as when Apple replaced the iPhone 4 with the iPhone 4S, there are few physical and electrical differences, so almost everything works. Other times, Apple changes both the size and the electronics of the phone: The iPhone 5, for example, had both a different shape and a completely different charge/sync connector.