At last, I was able to afford an iPhone 3G without an expensive data / phone plan (meaning a much higher starting price). Of course, I've been playing with the device since then.
Update & Restore
Submitted by Steve Green on Wed, 04/08/2009 - 23:00
Resetting your iPhone takes it back to the way it was when it came out of the box. This can be handy if you’ve installed a bunch of apps and your home screen is a mess, or if you’ve misspelled words and the misspelling have been incorporated into your dictionary. To reset the device, simply tap on Settings in your Home screen and then navigate to General >Reset.
Submitted by Anonymous on Wed, 10/01/2008 - 14:44
You should always use the latest version of iPhone software on your device. You do this through iTunes and have two options: to update the device or to restore it.