"We are aware of an issue related to non-repeating alarms set for January 1 or 2," Apple Inc spokeswoman Natalie Harrison said.
It is second alarm glitch in the past two months for the prestigious phone from the technology giant Apple Inc. Earlier in Nov 2010, same problem happened and many users woke up angry and frustrated.
Many users overslept on the first two days of New Year and many of them were late for work, airline flights and trains. Some users added that their phones had trouble at the end of daylight savings.
Any how, most of the iPhones started working properly on Monday, Jan 3. Apple said that users can fix alarm problem themselves by choosing a recurring alarm instead of a one-time wake up call.
"Customers can set recurring alarms for those dates and all alarms will work properly beginning Jan 3," Natalie Harrison added.