How to Keep App Data When Upgrading to 3G S

[redman042]

This might be a unique situation, not sure. I have a 3G and will be getting a 3G S on the 19th. I want to transfer all my apps and their data (game saves, etc.) to the 3G S. But my 3G has OS 2.2.1 on it, while the 3G S will come with 3.0. So I don't think I should just do a restore of my backed up 3G data onto the 3G S, should I? Won' that overwrite the OS and put a lot of junk on the phone?

I don't really want to upgrade my 3G to 3.0 first, mainly because I'm going to eBay it and I want to unlock the phone first.

 

[Excellerator]

You should be able to. After all, when you do a backup before upgrading it restores it on 3.0 if something goes wrong and you need to restore. Same principal.

 

[Eddyisgreat]

Apple should include provisions to update 2.2.1 data with the 3.0 structure (which shouldn't be drastically different, either).

 

[redman042]

So a restore only restores data and settings, not OS files?

 

[gamera~]

So a restore only restores data and settings, not OS files?

I believe a "restore" restores the system, but then the sync will install all apps/data/music/etc.

 

[bobsentell]

Here's an alternate idea (I'm sure others can correct me if I'm wrong):
Try updating your 3G to 3.0 on wednesday and then transfer the data over to your 3GS on friday.

But I think Apple may have something set up. If I recall, I think when I set up my 3G on iTunes that I was asked if I wanted to transfer files from my 2G.

 

[GTDaveMac]

The iPhone OS doesn't accumulate "junk" like you may be used to in Windows (or even Mac OS X).

All apps are sandboxed, and cannot write outside their application bundle.

I think the process is, in fact, to restore from your 2.2.1 backup. However, if you want to feel safe, upgrade to 3.0, as suggested above, first.