I spent lots of time trying to solve this problem but I still can't.

Got an Iphone 1.1.2 OOB with bootloader 4.6 (Win XP, Itunes 7.5).

I downgraded to 1.1.1 and successfully activated the Iphone but now I can't manage to upgrade ii to 1.1.2 and jailbreak it. Everytime I do it, I return to the inital mode "emergency call"...

I downloaded this file "iPhone1,1_1.1.2_3B48b_Restore.ipsw" and I click on Upgrade+Shift (not using the Restore button) while trying the upgrade..

Thx in advance for your help!!