I have this phone and it has always worked fine. I set an alarm to wake me up for work this morning but it didn't go off as the phone was turned off and failed to turn on, even though it was later revealed to be full of battery.

Whilst it was turned off it still had a green light where the lights are normally shown and after pressing the power, back and volume buttons in different combinations, it eventually turned on.

It has been working fine all day, but I am still worried that it might do this again. Does anyone know what might have happened and if it is now reliable?!

Thanks!