I have had my Cingular branded 6682 for a little over a year and haven't had a problem (besides an occasional reboot) with it. In fact, I love this phone. Yesterday, for some unknown reason I decided to update the firmware via the Nokia USA site. I followed this link:
http://www.nokiausa.com/support/software/softwareupdate/1,8838,,00.html?
I followed through the steps with no problem and left to get a quick bite to eat for about 30 minutes. When I came back I picked up my phone and noticed that it was off. Figured it was part of the update but I couldn't turn it back on! My phone was plugged into the wall outlet and my desktop is on an APC so I know there was no power disturbance during the update. I imediately called Nokia support and they told me to remove the battery for 15 minutes. I had already done that with no luck. They said I have to send it to a Nokia shop and it'll cost me $150!
So to answer the thread title, NO it doesn't!