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How to Downgrade Your iPhone 3G[S] from iOS 4 to iOS 3.1.3
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日期:2024-10-01
A lot of iPhone 3G owners—myself included—have discovered that upgrading to iOS 4 has slowed their devices to a crawl. If you decide the new features and shortcuts just aren't worth the glacial performance, here's how to downgrade your iDevice. Apple just...看更多