Tip: Updating iPhone to 5A347 reduces yellow tinge

From Ars Technica -

Ars Technica forum readers have discovered that iPhones purchased in-store were shipped with a slightly older firmware revision—2.0 5A345. Updating an older phone via the built-in mechanism in iTunes will pick up the newer revision, which resets the screen's color calibration to be a little less yellow and more like the original iPhone. Furthermore, store-purchased iPhones can be set to the 5A347 firmware by attaching the device to a computer, allowing a backup to be performed, and then clicking the "Restore" button. (Above photo shows two iPhone 3Gs running 2.0 firmwares 5A347 (left), and 5A345 (right).)

This process will take you at least 30 minutes depending on how much content is on the iPhone, but if that yellow tinge is annoying, it might be worth it.

Source article here.