How do I Ensure my Application's iOS Deployment Target will be Usable for that SDK?

You could try to run it on a device with the older sdk (we keep devices around with 3.1.3 for instance). However, you won't be able to find a downloadable version of the old OS from Apple.

You could try to run it on a device with the older sdk (we keep devices around with 3.1.3 for instance). However, you won't be able to find a downloadable version of the old OS from Apple. If you don't have a versioned device around, the best way would be to look at any "suspicious" pieces of code that might have new features and make sure they are available in your base OS version (using the class references) Yes, it's a bad system, but now you can start to keep old sdks around (i always make a copy onto a local storage device before I install a new version).

As for restoring your device: I think you have to have made a backup at some time (i'm not 100% sure). But if you could I think it would be in organizer on Xcode and I guess you could check in iTunes too.

I do have a friend who is running v3.1.3 on an iPhone 3GS. Do you foresee any complications if he "jailbroke" his phone? Thanks again!

– JRoss Jun 9 at 3:11.

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