my ipnone was already activated by previous owner, in sprint network. so, technically it pass one time activation procedure. now it has Bad ESN, but still shown like activated, on the check sites, like
http://****************/?imei=358538050400263
itunes say it not activated and cannot be activated, when I connect iphone with my carrier sim. some times, itunes show me message about invalid sim card. And I can't enter to iphone after that. Without sim or in airplane mode everything work well.
When I connect him without any sim card, couple of times it say, that iphone is already activated on CDMA US network.
I just want to say, i think, we still can unlock sim blocking with these files.