Some iPhone users in Asia and Europe have complained of malfunctioning alarms, even after Apple reassured users that its phones' built-in clocks will work today.
People complained they missed flights or were late to arrive at work, as the alarm built into Apple's iPhone failed to go off for a third straight day for some users.
The problem was not limited to the iPhone. Some owners of other Apple products, such as its iPod music players also complained of a similar problem with their alarms.
The last time Apple was embroiled in publicity problems was in last July after the launch of the iPhone 4, when reports got rampant about its bad reception.
This had no visible impact on Apple's sales as the firm sold a record 14 million iPhones in the third quarter, and is now the world's second largest smartphone manufacturer behind Nokia.
