Hi guys!
I have purchased an iPhone in the US and unlock it in Brazil. Everything seems to work correctly except that I have those annoying black screens that come up every 30 sec with the cancel accept buttons on the bottom (and the little back button on the upper left corner). Anyone has the same problem?
Of course I click cancel everytime since I have no idea why I receive those every 30 sec. I do not want to "accept" to realize it was the infamous 1.1 firmware update!!
Any help welcome!

did you put any other apps on the phone ? apps can cause problems like this.

try restoring to 1.0.2 it might fix the problem