Root changing the firmwire

[alteredmind]

Hi,
I am using an Xperia S. My firmwire is ICS currently. It is rooted, (but I do not know how to root a phone, my friend did it, when he used to use it). Now I want to change it to Jelly bean. But with PC Companion I am unable to do it. I do not know the manual system to update it. Can some one please tell me the steps?

thank you.

 

[D-U-R-X]

Per my PM, I've moved this to the "All Things Root" section, as this is a root related issue.

The process of changing the firmware is not the same once you are rooted - you shouldn't really use the standard method. Do you know if your friend put a custom recovery (like clockworkmod) on your phone?

I don't actually have your device, btw... I will try to help though or perhaps one of our members with the same phone could help you out

 

[Tyseyh]

Well, since its rooted does it have a recovery? If so flash a stock Rom from XDA. If not, your bootloader is probably unlocked, that's why you can't do it the "normal" way.