ok so i'm back with dfu phone with only 4.2.1 shsh saved in cydia
1. I'm able to run tethered without locking the scree on 4.1 1.59 via redsnow+snowbreeze-it's possible to untether without restarting just maybe modding some system files ( i have mine also running on 4.1 1.59) i know that they are some type of signature... but maybe it's a way?
2.if any other ways fail i have only one option to restore+update with itunes or is possible to get a custom 4.2.1 and phone will boot up normally or will go in dfu again?