iPhone 3GS units overheating, causing discoloration?

A number of iPhone 3GS owners have complained that the handset becomes overly hot, with at least one user reporting a discoloration of the white plastic back. Photos posted to the French site Nowhere Else (Translated Link) show a 16GB white iPhone 3GS unit with reddish/pink discolorations running vertically down the back on either side of the Apple logo; the user claims these appeared after the phone got “very hot” while testing out a variety of location-aware apps over 3G. At least one iLounge editor has seen similar behavior from his unit after connecting it to a specific battery pack for charging, and a thread on Apple’s support discussions site suggests others are also noticing their iPhones getting abnormally warm. It is unclear whether the issue is software- or hardware-based and if the warmth and discoloration problems are widespread. [via Engadget]

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