I'm looking at a website that was designed for desktop PCs but looking it on an iPhone (iPhone 3GS). This is as part of a website deign project, planning for mobile website serving.
Well, this old website, with zero preparation for mobile, scales perfectly to the iPhone screen.
The background image of the website header is known to be 1,000 pixels wide, and the iPhone screen resolution is 320 x 396 pixels - but the entire header of the website fits on the iPhone screen. It's a perfect copy of the desktop display, but on a smaller screen, everything just miniaturized, scaled down.
Nothing in the website sprogramming could be doing this.
But I can find no reference online to iPhone 3's having an auto-scale function in their browser.