Been looking around on the forums, and kinda got a jist of how this works for the ARC, I've rooted my own Samsung galaxy S2, but Im trying to do the same for a friend.
as mentioned hes currently running 2.3.4 on LT15i 4.0.2.A.0.62. From what I've read you have to downgrade to .42? if the bootloader is locked. however it it is unlocked (which I think it is/is unlockable) then what do I do next?
I plan to root the phone then probably install cyanogen mod on it instead.