Finnish handset-manufacturer Nokia Corp has admitted that some of its flagship N8 smartphones have an in-built slipup that causes them to go kaput entirely.

Some of the N8 users have reported that their smartphones turned off all of a sudden and could not be powered on at all.

Complaints of the problem emerged repeatedly in the media in recent days, prompting company's executive vice president Niklas Savander admitting the in-built fault and saying he was concerned about the problem.

The company claimed that the number of problematic handsets was very little; however, it refused to mention the exact number of affected phones.

But, Nordea analyst Sami Sarkamies said, "Probably not all consumers have informed Nokia about the problems, so the final number of faulty products is likely to increase."

Company spokesman Tapani Kaskinen said that the problem was covered by the warranty. Moreover, in case the original phone could not be fixed then the company would give a new one.

The N8 smartphone, which was made available in October, is Nokia's first handset to run the Symbian 3 operating system.