How To: Fix iPhone 3G/3GS 1015 iTunes Restore Error
iPhone 3G and iPhone 3GS owners must be familiar with 1015 iTunes error. This error occurs when you try to downgrade your iPhone from iOS 4.x to older firmware versions like 3.1.2 or 3.1.3. The 1015 error usually occurs at the end of the downgrade process when you are ready to reboot your device.
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