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Recently, people found the iPhone 4 alarm clock problem, which led the iPhone owners slept over it because the phone's alarm rang an hour later than it was set.The iphone 4 alarm fault is a major bug in iOS platform and is related to the change from summer to winter time, which was applied in the morning Sunday 31/10 simultaneously in all European countries. The bug occurred a week earlier in New Zealand which preceded the change in the winter time, although a few days after the problem was restored.