Default [Q] Can't downgrade from 4.1.2 to 4.1.1

Hi guys,

A friend gave me a Galaxy Note 2 N7105 (LTE) for some times. But it is simlocked so I tried to downgrade it from 4.1.2 to 4.1.1 as it is explained in this tuto: http://forum.xda-developers.com/show....php?t=2612485

But when I flash the 4.1.1 (downloaded on samfirmware), it stays blocked on the "SAMSUNG" logo at boot... Any solution ? Is there any issue about downgrading ?

Any help would be great...

Thanks friends!