September last year, when I tried to upgrade my iPhone 4 to iOS 6, I got -1 error. I tried many times to restore it and went to Apple store few times, still cannot make it work. I had to get an iPhone 4S since iPhone 5 was too hot to get and I could not wait.
Within this year, I tried different ways and many time to make my iPhone 4 work, but not successful. When iOS 7 came few weeks ago, I tried to restore my iPhone 4 with it. The -1 error was gone. But I still got an error without number.
Yesterday, I like to try my luck with iOS 7.0.2 and restored my iPhone 4 successfully! It is working now and running iOS 7.0.2!
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