I just upgraded phone to 5.1 and it will not run on my xcode- checked out I need the latest xcode - cant just download SDK didn't really want to upgrade to lion as I thought I would upgrade next software to mountain lion. Anyway to develop for 5.1 need latest xcode and need latest OS Hope that helps anyone

Hi Marko, Thanks a bunch for the tip. I was going to upgrade to 5.1 myself. Not going to for a while it seems.

Now I need some info if possible to downgrade back to 5.0 so that I dont have to get lion

Can you try with a simple option+restore in iTunes using a 5.0 firmware file?

From what I can find it gives it a factory reset but then does not offer you the chance to choose IOs version but just to have latest one. Dont know how correct this is?

On Mac if you click on restore while pressing option it gives you the option to load a file from the hard drive. For Windows is Shift+Restore.

you may have to go to a jailbreaking site like iClarified to get the IPSW firmware file for the iOS you want to downgrade to (5.0.1?). And as long as Apple is still allowing that firmware, then use the option+restore method mentioned above.

Marko, check this link: http://www.ijailbreak.com/how-to/downgrade-ios-5-1-to-ios-5-0-1-5-0-ifaith-windows/ I have not tested this and I'm pretty unaware of all the recent changes in the jailbreaking world. There may be other tools/ways to downgrade your device, this is just a link I found on Google. Best of luck!

Before I found this discussion I updated a related one I started a couple of months ago here. http://www.buzztouch.com/forum/thread.php?tid=057AD0C79A29CB1D2265B7F But as its uncatagorized I'm not sure how visible it is and may not get responses. So to add info to this discussion I found this... "Installing iOS on a Device When you develop iOS apps, you should test those apps on the set of device and iOS-release combinations you intend your app to run on. Important. After you upgrade a device’s OS, you cannot downgrade it, that is, you cannot install an earlier release of iOS on your device." At this location. https://developer.apple.com/library/ios/#documentation/Xcode/Conceptual/ios_development_workflow/10-Configuring_Development_and_Distribution_Assets/identities_and_devices.html

The statement : "you cannot downgrade it" should actually read: "we don't want you to downgrade it". Depending on which versions of iOS Apple is "signing" at any given time, you may be able to revert to a recent version using the option+restore method (I think apple keeps this option open for a while in case of a bug in the newest firmware). Or you can use any of the "alternative" methods to downgrade. Just because Apple may not want you to, doesn't mean you aren't able to. Comedic Disclaimer: The views and methods referred to in this post are not necessarily the views of BuzzTouch, lol.

I didn't intend upgrading to Lion just yet either. See my previous discussion about this here... http://www.buzztouch.com/forum/thread.php?tid=057AD0C79A29CB1D2265B7F (The following is copied from the previous discussion but is relevant here in this catagorized thread :) ) Some useful info for anyone following a similar path... I initially registered as an Apple Developer (free) and thought I'd join the iOS Dev Program when I was ready to submit to the App Store. But could only use Xcode 3 at this level. I could test on the simulator but not on a real device. To test on a device I registered as iOS Dev (and paid $99 equiv in GBP) and got Xcode 4.2 for Snow Leopard with iOS SDK 5.0 However, my iPhone 4 already has iOS 5.1 and cannot be used for testing with this setup. I cannot restore iOS 5.0 on the iPhone 4. So the only way from here (as I see it), if I want to test on a device and submit to the App Store, is to upgrade to Lion with Xcode 4.3 and iOS SDK 5.1 OR buy another iPhone that still has iOS 5.0 or below. For those of you still on Snow Leopard... do you test on iPhones running iOS 5.0 or below? Is this the way you see it too? I will hold back taking the plunge upgrading to Lion until I see a few responses here. I value your advice. :)

I have been forced to Lion - for the above reasons. Its like being forced on a blind date but the date is quite cute. I am getting to sortof like Lions. Ebook software and new xcode is a plus.