I tried to install iOS 5 (and I downloaded iTunes 10.5) and when I finally restored my iPhone and told it to restore with iOS 5 I was given the message "this device is not registered as part of the iphone developer program". Now I'm terrified that my phone is bricked and I really just want to go back to iOS 4 but itunes keeps telling me the same thing so I tried putting it into recovery mode but it still wouldn't restore so then I completely removed itunes (10.5) off my Macbook Air then redownloaded 10.4, removed the .itl files and such from my finder but than it tried restoring again and it gave me error code 1604. The itunes website told me to switch usb ports which I'm doing now but things aren't looking good. I'm currently downloading iOS 4 in the hopes that I can use the option key and click on it to restore with but I don't know if that'll solve anything. I'm so scared right now because I don't want to lose my phone and such. ANY help would be greatly appreciated, thanks.
EDIT: The version of 4 i downloaded apparently wasn't compatible. Great. I realized I had been putting it in recovery mode when I needed to do DFU. I put my iPhone in DFU (using Tiny Umbrella to kick it out of recovery mode, turning off my phone, holding down the power button and home button for 10 seconds, releasing JUST THE POWER BUTTON and holding the home for another five). Then i attempted to restore but was given "This device is not eligible for the requested build" and I found out how to solve this issue via this video ( http://www.youtube.com/watch?v=uL_IWgJ7VNM ) (if you're having trouble replacing the host file just delete the original and replace with your edit) AND IT WORKED. I'm ecstatic. I tried being detailed to help anyone else with this problem.
Please lock.
EDIT: The version of 4 i downloaded apparently wasn't compatible. Great. I realized I had been putting it in recovery mode when I needed to do DFU. I put my iPhone in DFU (using Tiny Umbrella to kick it out of recovery mode, turning off my phone, holding down the power button and home button for 10 seconds, releasing JUST THE POWER BUTTON and holding the home for another five). Then i attempted to restore but was given "This device is not eligible for the requested build" and I found out how to solve this issue via this video ( http://www.youtube.com/watch?v=uL_IWgJ7VNM ) (if you're having trouble replacing the host file just delete the original and replace with your edit) AND IT WORKED. I'm ecstatic. I tried being detailed to help anyone else with this problem.
Please lock.
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