Apple's iPhone owners overslept by an hour on Tuesday morning after a glitch in the gadget failed to set off the alarm on time.
Angry users inundated Twitter with thousands of messages about the gaffe.
Earlier, the company came under fire over reception problems with the release of the iPhone 4 in the summer, reports the Daily Mail.
Last week, another glitch was revealed where people could access the iPhone without knowing the security keycode.
Tuesday's error, contained within the iPhone's recurrent alarm feature, meant the alarm setting remained the same as it was before the clocks were changed at the weekend.
Users of Twitter were also quick to make jokes at Apple's expense. Garrettc wrote: "Daddy, do you remember where you were during the great iPhone alarm calamity of 2010?' 'No son, I was asleep.'"
Siobhan-83 wrote: "Ben's iPhone alarm didn't go off this (Tuesday) morning, used it as an opportunity to tell him younger, newer models aren't always the better option."
However, James Oakley from London did not see the funny side. The 26-year-old office-goer said: "I can't believe Apple can't even get something as basic as an alarm clock right."
"I woke up late and my boss was not happy when I got in, and I'm sure the same thing happened to thousands of people," he wrote.
Technology expert for gadget website CNET Rich Trenholm, said: "Apple has been having a lot of problems recently and this is just the latest in a line of gaffes. Making sure you wake up at the right time is very important to people and a quick search online shows how angry they are."
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