Yes, I've gone through many pages in this website before posting this question .
(1) I'm using Sony Ericsson Xperia Arc S (2.3.4 // 4.0.2.A.0.62). Let us say this configuration "State A".
(2) I wish only to root it. I don't wish to unlock bootloader. I don't wish to change my current OS version. Is this possible?
(3) Let answer to above question is "yes", and I root the phone successfully to, say, "State B". Then would it be possible, by some means, to bring the phone again in "State A"?
Thanks & regards,