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[疑難求助] JB 了如何upgrade to iOS7呢?

我的iPhone5 JB了, 現在如果要upgrade 去iOS7聴說會有問題,請問各位專家那要如何還原我本來的iOS呢?
you need to restore back to your original os~ u can use a program call "apple restore tool"
and download the ios version you currently have and restore back to normal iphone~
I thought you can just download the newest version's image (ipsw file) and restore it into your phone then is fine. I think you can use itune
just use itune
I think I got It. Thank you so much!!
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