I had the exact same experience - made a call, put the phone down, picked it up a few minutes later and noticed it had shut down, Battery was fully charged, but it still would not turn on. I pulled the battery and re-inserted, but still nothing. I even tried re-charging the Blackberry via the wall charger for a few hours, again, still nothing. Finally, I decided to take the Blackberry to 3 different retailers to see if they could resolve the problem - all 3 inserted a new battery, but could not get it to power back on - one even tested the battery for power and it showed that it was fully charged - another retailer tested my better in a new Blackberry and it worked fine - so its not a battery issue, it is a hardware issue, or possibly a firmware issue - could be a loose wire, so servicing will be required, or the software has to be reinstalled and if the phone isn't powering up to allow you to do that, then you will have to take it in for servicing regardless.
Isn't RIM supposed to be good at what they do??? this is my first and last experince with them. I'll be switching to the iPhone once my contract expires. I hope to get a better product from a comany that stands behind it's products, especially for the type of dollars I am shelling out. Both cost about the same, but looks like Apple iPhones is the way to go
