If you haven't read this yet, please do:
At&t captivate shut down press release - xda-developers
Believe me, I know this is an extraordinary number of exchanges - I have experienced the pain firsthand. I do recognize the potential for (my) user error to be a factor in this equation but I refuse to believe that I am that grossly incompetent or have some sort of anti-Midas touch. Some have failed before I even got a chance to load any apps or personalize them in any way.
They just kept giving me refurbished phones that had the same issues. Every single phone they gave me had an IMEI that was within the range of those with "known issues." That said, my only choice was to take the replacement and hope it worked better than the one I knew was defective.
I installed Cognition 3.02 and 3.04 on my latest one and, knock on wood, it hasn't failed yet. Maybe I finally got a good one. Maybe the custom ROM did the trick. Either way, I don't care because they should have pulled the known defects out of the market instead of recirculating them through various DSCs so that I didn't have to exchange and rebuild my phone every 2 weeks.
This forum is full of people who have been affected by the random shut down issue and it has absolutely nothing to do with what apps they load or how they use their phone. Multiple replacements for a single user are not an uncommon occurrence.
PS - I have considered getting something different but I paid for the top-of-the-line model and refuse to take a step backwards because they made a crappy product. I stand my my plan to ride out the storm with this phone until the next batch of phones hits the AT&T market and switch it out then.
Needless to say, Samsung will not be on my wish list.