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Wi-Fi Sync enables wireless syncing with iTunes at the touch of a button. Never go looking for that USB cable again. Sync from the car, bed or shed whenever it suits you.
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The below would probably work on Android phones too.

-RandyFortunately, there's plenty you can do to increase your iPhone's battery life. Here's a comprehensive list for anyone frustrated with his or her device's endurance. Our recommendation? Implement all of these fixes, bask in the glory of your device lasting for several days at a time, and then bring back a few features you really miss.
Mirrored from Randy's Home On The Interwebs.
