We’re using the iPhone 2.1 software for all of these, so if you don’t find them on your iPhone, you may need to upgrade.

1. Enable Call Forwarding – You can quickly and easily enable call forwarding on your iPhone. Simply touch Settings>Phone>Call Forwarding

Turn Call Forwarding on, then enter the number you’d like your calls to forward to. That’s it.

2. Adjust the speed of your Audiobooks – If you feel like the narrator of your Audiobook selections is talking too slow, or too fast, you can easily go in and change the speed at which they speak.

Touch Settings>iPod>Audiobook Speed

Here you can make the Audiobooks slower, faster, or set them back to their normal speed.

3. Adjust TV Out and Closed Captions Options – in the same iPod Section you can select to turn Closed Captioning On or Off and you can adjust how your video will play on an external display like a television. Widescreen On/Off and NSTC/PAL Settings are right at your finger tips.

4. Adjust Capitalization and Caps Lock Settings – If you’re annoyed by the Auto-Capitalization feature of the iPhone keyboard, or want to shout at people by using all Caps you can easily adjust these settings in:

Settings>General>Keyboard

5. Force an iPhone into restore mode - This final function is not located in the settings, but can be helpful if your iPhone has locked up and can’t seem to get back into working order.

All you have to do is Turn Off your iPhone (press the Sleep Button+Home button until the phone shuts off), then connect your iPhone to your PC or Mac, and open iTunes.

Once you have iTunes open hold down the Home button and iTunes will prompt you to perform a software restore.

5 iPhone Functions You May Not Know is a post from: iPhonetastic.com