So, I always wondered about the answer to this question...

[dranakin]

What's the procedure to go from JB 3.0 to any JB 3.XX?

I'm running a JB 2.2, and never upgraded to 2.21 because I feared that you have to do the full Pwnage tool restore for each incremental update. It takes a couple of hours to restore all your music, photos, apps, and Cydia apps...

Here's how I always saw it:

Clean iPhone
JB
New update comes out
Have to create a new IPSW with Pwnage tool
Shift-Restore with custom IPSW
iPhone is JB with update, but you have to sync everything again


Is that true?

 

[jmann]

Or you can upgrade using iTunes (lose just the jailbreak stuff), then use Redsn0w to jailbreak it, and it won't erase anything from the device.

 

[dranakin]

Oh, so everything sits on your partition when you update, you JB again using redsn0w, and then you have access to everything again? Man, I should have gone to 2.21 a long time ago! So, does that work for going to any update (example: from 2.2 to 3.0)? Or does that method have to be within each number (2.xx>2.xy)? Thanks.

 

[jmann]

Oh, so everything sits on your partition when you update, you JB again using redsn0w, and then you have access to everything again? Man, I should have gone to 2.21 a long time ago! So, does that work for going to any update (example: from 2.2 to 3.0)? Or does that method have to be within each number (2.xx>2.xy)? Thanks.

All your jailbreak stuff will be gone. You want to "back up" stuff by using something similar to aptbackup.