hi all heres my question
I have just bricked my phone but got it back to stock so all is good. thanks to help on xda.
I have got a sgs2 i19100 its locked to o2 uk not rooted or modified so in original state now.
I have just read the guide for flashing jb 4.1.2 xwlsw as in the guide.
does my phone need to be unlocked or rooted before I do this or can I just install the jb rom using odin .???
my phone at the moment is
smp pre-empt thu may 16 10:05:20
Thanks for reading and would this make the phone run better and battery last longer