Note: Make it on your own risk, we are not responsible for any damage for your Device, but I tried it on my device and it's working.
Steps:
Step 1: Download the firmware you want to downgrade then Download rslite.
Step 2: Now connect your iPhone to computer.
Step 3: Put your iPhone into DFU mode by using the step by step guide from Here.
Step 4: After putting your iPhone into DFU mode, iTunes will prompt a message “iTunes has detected an iPhone in recovery mode”. Click “OK”
Step 5: Then Hold down the Option Key and click Restore on your iTunes.
Step 6: Let the iTunes Restore, at the end of restore you will get error 1015.
Step 7: Now run rslite which you downloaded (it will open in terminal) and this will by pass error 1015. But if you got this message then go back to Step 3 and put your iPhone into DFU mode
Connecting…Step 8: Execute the following
Apple Mobile Device not found in Recovery or DFU
logout
setenv auto-boot trueThat's it, you should be now with iPhone running 3.1.3 or 3.1.2.
saveenv
reboot
If you had any errors, feel free to comment asking what you want and I will answer you.
Categories:
Apple
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Apple Guides
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Downgrade
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iphone
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iPhone OS 4
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