Hi Gerry,
I have an iPhone via T-Mobile Germany and I have a memory stick from T-Mobile that I used frequently, but use just once in a while in the meanwhile. Recently the T-Mobile Internet Manager software that comes with the stick crashes sometimes even the stick is not installed. (Last December I switched my Internet connection provider. Telekom messed it up big and it took almost 6 month to get me a working telephone and Internet connection. At this time I got my Internet connection via that stick. I also use it when I'm on the road and the hotel doesn't offer Internet or only paid Internet.)
The crashes started in January according to the log. If the log was not deleted the stick drivers might be the cause. Since I don't need it right now I will try to deinstall the stick.
Cheers Marcus