iOS 5 GM installation question

[BoDEAN]

Running a VZW iPhone 4, JB'ed with 4.2.8

Two questions. I read somewhere this quote..."Note that only Factory Unlocked users should restore to iOS 5 GM. Otherwise, you will lose the unlock forever. "

Can someone explain what that is? Not sure if I am affected by that.

2nd....is the correct steps to installing IOS 5 GM (non-jb) to my phone, 1) backup iPhone in iTunes, 2) Shift/restore, install the IOS 5 GM?

Then All my stuff (pics/music/apps) should resync with my iPhone and be good to go?

 

[Europa]

They are addressing unlockers, not jailbreaks. Also, this only applies to the AT&T iPhone. The "forever" claim is extreme, as there is no reason to believe there won't be any future unlocks, but this bluntness is the best way to convince unlockers that upgrading can have serious consequences.

Yes, you can use a backup from 4.2.8.

 

[BoDEAN]

Thanks. How does the backup work for my music? As I manually sync my music onto my phone.