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[疑難求助] [求救]IPHONE4.2.1更新問題

因為小弟好耐無更新,大部份APPS,例如WHATAPPS已經用唔到,話我版本太舊,但係更新又要IOS4.3
我部機JB左,想問點BACKUP同更新,因為ITUNE都BACKUP唔到同更新唔到
You can transfer your iphone apps back to iTune, but make sure your iTune doesn't have a newer version of that app. For example, you can delete the whatapps from iTunes then when you connect your iphone to iTunes, you can transfer your apps back to iTunes. Just right on your iphone in the iTunes, you will see that transfer menu.

For your JB apps, you can download an app from cydia and backup your JB apps.
backup manually, restore ur phone using the latest itunes then JB again and move ur files back
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