Nokia N95-3 Mysteriously Shuts Down

I don't know what it is with my Nokia N95-3, but it always yields a sense of uneasiness when it comes to trusting it. Especially with my phone tend to power itself down for no reason. It happened a couple of times when I first bought the phone. But ever since I upgraded the latest firmware, 20.2.011, it has turned itself off unexpectedly twice in one week including this morning. Is anyone else seeing this? My patience with Nokia phones is running pretty thin these days.

Reference: My N95 occasionally shuts down unexpectedly...
Reference: Nokia N95-1 Automatically Shuts Off...
Reference: Howard Forum - N95-3 turns itself off randomly. Anyone else? Suggestions?
Reference: Howard Forum (my thread) - N95-3 Shuts Off Randomly, post 20.2.11 upgrade

Update: 6/4/08 - My N95 unexpectedly shuts down again this afternoon... made me miss 3 calls.
Update: 6/9/08 - N95 Shuts down in middle of night... my worst fear comes true
Update: 6/19/08 - Nokia N95 Shuts Itself Down, Once again
Update: 6/23/08 - The N95-3 Shuts itself down in the middle of night, once again!
Update: 7/8/08 - N95 Shuts down twice over past week, possible solution with network setting?