Why i´m posting this thread?
Because it seems that it is not possible to downgrade new OTB 1.1.2 iPhones to 1.0.2.( i have week 48 iPhone).
Why you need to downgrade 1.1.2 to 1.0.2?
If you have NO WIFI problem the only way to Jailbreak your iPhone is by downgrade to 1.0.2.
NO WIFI problem seems to be very common and i try to find solution for that.
When you try this do this by Restore it first to 1.1.1 and then without jailbreak to 1.0.2.
I just need confirmation is it possible or not.