I use my phone as an alarm clock and it's always gone off without a hitch. I usually wake up at 4:30am (EST) in order to get to work and start up a few servers. However, this morning my wife woke me up at 5:30am saying I was late, I looked at my phone and my phone said 2:30. So, I opened and closed some apps, went on the internet (even went to the "what time is it" website and it all said 5:30. So I rebooted the phone and the clock returned to normal. Anyone seen this before? Is this a sign of a defective unit?