Hi guys, I accidentally restored my factory unlocked iPhone 3GS to iOS 4.3.5. Fortunately, I have saved iOS 4.3.3 SHSH blobs from Cydia. So I downgraded it using TinyUmbrella, but iTunes gives error 1015 to me and my device gives going back to recovery mode. Any suggestions? Thanks.
Asked by: Cory from Nagoya, Japan
Step 2: Download Zlib1.dll from here and put it in the same location where fixrecovery43.exe is located.
Step 3: Then connect your iPhone 4 into the computer via USB cable and power OFF your device.
Step 4: Launch iTunes as well as the downloaded TinyUmbrella (Fix Recovery) and put your iPhone into DFU mode.
- Press and hold the Power and Home button for 10 seconds.
- Then release Power button after 10 seconds but continue holding the Home button for another 10 seconds.
Step 5: That’s it! TinyUmbrella (Fix Recovery) will start fixing the error on your device.
After you have successfully fixed and restored iOS 4.3.3 firmware on your device, you can now jailbreak iPhone 4 using JailbreakMe 3.0 or Redsn0w 0.9.6RC16. The step-by-step guide on how to jailbreak iPhone using JailbreakMe can be found here, while the tutorial on how to use Redsn0w is posted on this link.