So you've realized that your iPhone's screen dims on its own. What's happening there? Is there something wrong with your phone? If you're looking for answers to such questions, you're not alone.

I've got a 32GB iPod Touch running 4.2.1 and I'm looking for a way to disable the auto-dim feature. I can't find anything in the standard Settings applet. I've jailbroken this thing with redsn0w so ...

Not every setting on your iPhone is helpful all the time. Auto-brightness is intended to make it easier to see your screen, even if the light around you shifts. Sensors adjust the brightness reading ...