iPhone alarm glitch makes dozens of British owners late for work

"STUPID iPhone alarm" makes hundreds of British workers late when the device fails to adjust with country's clocks.

The "stupid iPhone alarm" made hundreds of British workers late when the device failed to adjust with UK clocks.

Dozens of British iPhone 4 users said they were late for work Monday after a software bug meant the alarm on the Apple device failed to adjust when the country's clocks changed.

Hundreds of angry comments were posted on microblogging website Twitter about the apparent glitch, which happened within the recurrent alarm feature and meant the alarm setting remained the same as it was before the clocks were changed at the weekend.

"Well done Apple - you've made me decide I need to use a proper alarm clock rather than relying on my iPhone," one user tweeted.

"Stupid iPhone alarm clock went off an hour late. What a great start to the week," said another.

Britain put its clocks back by one hour Sunday from British Summer Time to Greenwich Mean Time.

There was no immediate response from Apple, but the tech giant said last month that a software patch was being developed when Australian iPhone users had similar problems - though their alarms went off an hour early as the country was switching to daylight saving time.

The latest fault can apparently be avoided by using one-time alarms instead of preset daily wake-up calls.

The iPhone 4 suffered a turbulent launch after problems with its antenna, while the launch of the white version was recently postponed again until next year.

But Apple has described the iPhone 4 as its most successful product launch ever, with more than three million sold in the first three weeks after its debut.