Good News and then a bad one.

Bad News - I got my thrid phone from T-mobile. The phone worked and then not.

Good News - I now know how it stopped working. All three times, whenever I shut-off the phone, holding the red cancel key, and start the phone again, the phone would not recognize the sim card. This I learned after the thrid phone - too bad . But all three times, this happened as a consequence to some other thing, so I plead innocence here.
Now the million $ question is why? Why would BB not allow me to shut off and start again?
Also, what has happened? Is there some hardware problem due to the off-on cycle. However, the first time when I insert the SIM card and turn it on it worked.

Which means shutting off with the SIM card inside, leads to the SIM card not being recognized.
I will be requesting a new SIM card from T-mobile and try it with it. I hope the phone does not get damaged due to off-on cycle. I feel sorry to have got a third phone from T-mobile.
I am a software engineer; 40 hrs. a week I write code and then debug it. I didn't want to debug problems outside work, alas

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I will let you know about how the saga unfolds after I get the new SIM card.
Stay tuned until next time.