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Introduction

Now V2.17 3uTools supports downgrading iPhone 4s and iPad 2 to iOS 6.1.3 after jailbreak without SHSH.

  1. Launch Cydia and add repo: http://repo.tihmstar.net to enter KDFU mode (Please check the detailed tutorial). Only when your iDevice is in KDFU mode, you can downgrade to iOS 6.1.3. Please make sure your iDevice is in KDFU mode, then continue to downgrade.
    • Launch Cydia and add repo: http://repo.tihmstar.net to enter KDFU mode (Please check the detailed tutorial). Only when your iDevice is in KDFU mode, you can downgrade to iOS 6.1.3. Please make sure your iDevice is in KDFU mode, then continue to downgrade.

  2. Download the corresponding custom firmware for your iDevice;  http://www.3u.com/tutorial/articles/4207...
  3. Launch 3uTools and go to “Flash & JB” -> “Pro Flash”, click “Import Firmware” and select the firmware you have already downgraded.
    • Launch 3uTools and go to “Flash & JB” -> “Pro Flash”, click “Import Firmware” and select the firmware you have already downgraded.

  4. After you import the firmware, click “Flash” on the right bar.
    • After you import the firmware, click “Flash” on the right bar.

  5. Now 3uTools will automatically flash your iDevice, please confirm the connection between your iDevice and pc. Now 3uTools will automatically flash your iDevice, please confirm the connection between your iDevice and pc.
    • Now 3uTools will automatically flash your iDevice, please confirm the connection between your iDevice and pc.

  6. Normally, it would take around 10 minutes to downgrade.
    • Normally, it would take around 10 minutes to downgrade.

Conclusion

To reassemble your device, follow these instructions in reverse order.

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