iphone 4 baseband unlock.
 

hello is there a way to update my baseband from 03.10.01 to 04.10 to unlock with gevey sim because gevey sim seems not to work well with this baseband

i'm om
bb 03.10.01
frameware 4.3.5

first try to downgrade on 4.2.1 and restore it with itune on 4.3.5

don't have shsh files save for 4.2.1

was on 5.0.1 and i downgrade to 4.3.5 as i only have shsh for that i use a custom 4.3.5 to downgrade now i want to restore again to a clean apple 4.3.5 to see if baseband will update to 4.10


can it be done ? i try but keep getting itunes an unknown error occurred (1)
when get close to finish