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iPhone Hardware and Accessories Discuss iPhone hardware

Need Help Switching to a Another iPhone 4 Without Updating Firmware


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Jaygray

 
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Member Since: Mar 04, 2008
Posts: 1,115
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Got a question for a jailbreaker who's bought a second hand 3GS or 4 before.

I'm supposed to pick up a preowned iPhone 4 (with 4.1 FW) this afternoon. I currently have a 3GS, and want to switch over to the iPhone 4, but I can't let the firmware update to 4.2.1.

I plan on cutting my existing sim card down to fit. The videos online look super easy.

If I backup my 3GS and "restore from backup" will it update the firmware?

Or do I set it up as a new phone, and then just insert my sim? I assume setting it up as a new phone won't update the FW...

I have over 100 apps all organized in folders. If I could restore from backup, it would save me a lot of aggravation reorganizing everything...

I'm not sure if the new phone's blobs are saved w/ Cydia. I use Tiny Umbrella to save the blobs on my 3GS. I suppose I can plug the new phone in and quickly save them, but I've never needed to use them, so I don't know the exact process w/ Tiny Umbrella.
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