If you're into quality sound, whether talking on the phone or listening to music, Motorokr S305 Bluetooth stereo headphones, made by Motorola, is an item worth considering. You can use the mic that's built into these headphones whenever you answer the phone. If you like great sound in your car, with the Belkin TuneCast Auto Live FM Transmitter, you can listen to music on your car stereo that's transmitted from your iPhone 4. If you listen to the radio when driving, you know that radio reception varies quite a lot, but this unit has built in GPS scanning to get the strongest signal wherever you are. This is a good way to make sure you're getting great sound in your car no matter where you may be. The Belkin TuneCast is an efficient, wireless system that lets you run your car stereo from your iPhone or iPod. mobile tracker On the other hand, some people want more custom type cases, and there are also these if you search online. Whatever kind of case or pouch you choose to get, you need to protect your iPhone 4 somehow.