Many Apple iPhone 4 owners have found yellow spots marring the display of the new device. This is not the first time display issues have cropped up with a new Apple product - earlier this year, users complained that the screens of their new 27in iMac computers had a yellowish tint. Apple had acknowledged the fault in February and offered refunds. A number of blogs including Gizmodo and MacRumours have reported that complaints have been pouring in from all parts of the world about yellow spots and lines on the new handset's high-resolution Retina Display screen. Gizmodo said it had already received 27 reports of the problem.

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