Originally Posted by fsager
It's a T-mobile branded 9780 with a T-mobile SIM, and the phone is still locked to tmobile. I tried the SIM in my old 8900 and 8320 with the same message and a myTouch slide 3G which had no error, but wouldn't connect to a network. Yes, I have a propper data plan. I did not believe TMO or RIM would remotely fry the SIM but I do believe it possible that faulty code in the OS could damage the SIM. The SIM that fried was just over 2 years old and was the one that came with my 8320. I got the SIM that came with the 9780 and had CS activate that SIM. So far no issues. Unfortunately, there is no way of knowing if my SIM would still be working if I didn't load this OS. I will monitor the event log and go back through it to see if there was any indication of the OS playing a part.
Posted via BlackBerryForums.com Mobile
Seriously, you will be fine with the new SIM/OS.