Switching Data from iPhone 4 to 3G?

[illjigga24]

I haven't found specific, easy instructions on how to do this. So I apologize in advance for my newbie-ness.

I am traveling to Italy and need to use my friend's 3G to unlock (I have a jailbroken iPhone 4 4.1, and no unlock is available of course) and use an Italian SIM card.

My dilemma is transferring my backup file from my iPhone 4 to the old 3G without restoring and updating because I NEED to jailbreak and unlock! Unless there is a way to update, jailbreak and unlock the newest software apple offers. Any suggestions would be appreciated!

Thanks!

Chris

[Simon]

What firmware are they on?

[illjigga24]

Honestly I am not sure yet, I am picking the phone up from him in a few hours. I guess I should have asked him that first lol

[Simon]

As long as they are on the same firmware then you can share the backup between them.

[illjigga24]

Ok thanks a lot. I will know more in a few hours. I appreciate the fast response.

[Simon]

no prob, just let me know when you get it and we can go from there

[illjigga24]

OK I got the 3g.

Its firmware is 05.11.07. While the iphone 4 is 02.10.04.

I guess I'm gonna have to do some modifications to be able to transfer the data and still UNLOCK?

[i.Annie]

That's your baseband. You would want to see your firmware version such as 4.1 or 3.1.3 or something.

[illjigga24]

It actually wont be an issue. I found an old backup that is compatible! Thank you so much for your help everyone.

Now I have to try and unlock this thing

[Simon]

What firmware is it on?

[illjigga24]

The 3G is 05.11.07

[Simon]

Not your modem firmware. What firmware is the iPhone itself on? 3.1.2 I am guessing?

[illjigga24]

Yes sorry. It is 3.1.2

[i.Annie]

That firmware will be said to be "too old" by iTunes to restore from the ip4 backup. You'd have to upgrade the 3G with a custom fw to 4.1 or 4.2.1.

[StealthBravo]

+1 Annie

[Simon]

He said he had a old backup that he used though, so that may have worked out for him. If you want to jailbreak on 3.1.2 then redsnow 0.9.4 is what you need.

[i.Annie]

Right, but I was thinking in terms of iPhone 4 to iPhone 3G. Not sure if OP has one from another phone. iPhone 4 could've never been on anything lower than 4.0 which I assumed would also not go onto a 3.1.x device.

[Simon]

You're right there

[i.Annie]

Lol I feel accomplished.

[illjigga24]

I actually just restored it, luckily! After it syncs all the apps and music I will work on the unlock.

Just to clarify, I had an old 3GS backup file, not the ip4 one lol

Now I'm having a problem with the sync. I synced it to iTunes to completely restore with apps and music but it keeps crashing iTunes! Why is this happening?? I'm using a Mac computer and have never had this issue.