Have stock original iPhone 4. Looking for advice from jailbreakers

[sekker]

My wife has an original 32GB iPhone 4 running the original broadband and iOS 4.0x

She would like to go up to iOS5.

I'd like to keep the options for going back so we could jailbreak it and/or unlock in the future. I made the mistake of upgrading my iPhone 4, and it seems to be practically impossible to unlock without one of these hardware mods.

I have run tiny umbrella.

Anything else I need to do before I upgrade?

Thanks in advance!

[Gareth]

If you want to preserve the ability to unlock, you can't do a stock Apple upgrade to iOS 5. This will update the baseband, and there is no unlock for anything other than the original baseband for the iPhone 4.

[deckeda]

My understanding is that you'd need to build a custom firmware with the original baseband (1.59) and iOS5 using PwnageTool or similar. Start readin' ...

[sekker]

Thanks.

I'm going to think more before I run the update.

[zachdog]

Give her your phone and keep hers at the old firmware.

[Chakravartin]

4.3.3 is the latest with a stable untethered jailbreak.

There's supposedly an untethered jailbreak in the wings for iOS 5, but they're waiting for at least the next incremental update before they release it out of fear that Apple will plug the hole.

[sekker]

I thought the bigger issue was a stable unlock in iOS5? In other words, they have decent jailbreaks, but not good unlocks, unless you have the original baseband.

Or has that changed?