If you are having some fun and games getting iOS 4.2 onto your iPhone then the following may help.
It seems the quick'n easy way to get the new OS onto your device for testing your Apps will no longer work. You'll find that downloading the updated OS and then restoring the phone in iTunes will partially complete, but right at the end you'll receive an error (often error 10) which leaves your iPhone in a state that needs fixing (restoring back to iOS 4.1 in iTunes).
Here's what you need to do:
- BACKUP your device.
- Ensure you have downloaded and installed the latest beta XCODE.
- Run XCode and connect your iPhone.
- Click 'USE FOR DEVELOPMENT'
- You may need to authorise with Apple using your DEV account.
- Once you are done, you'll get the option to restore the iPhone in XCODE. Ensuring the right OS is selected in the drop-down (other > select OS 4.2 that your downloaded from Apple), click restore.
- Once restored, fire-up iTunes and restore your backup. You 'may' have to try this a couple of times as sometimes the first time fails (don't panic!).
- Test away.....
Personally I think what we have to do now makes sense, it was too easy previously for anyone to hack-about and play with the new OS (non-devs just to get the latest features). Bringing it into XCode somehow makes me feel happier.
NOTE: no guarantees, do at your own risk!
