I have an unlocked iphone with installer.app , its unlocked because i wanted to use the iphone in Canada, anyways Ive been using it for almost 3 weeks now and yesterday it turned off after placing a call and I had to hold the power and home button for 10 seconds before it turned back on ... it did it again today. I figure it has something to do with the 3rd party app ... anyone else having this problem? can i restore it and unlock it using a different program? anyone have any suggestions? there doesnt seem to be too many others having this problem