BEST ROOT METHOD (Worked for me)
Originally Posted by sekhon9
i've a xperia arc s flashed with 4.1.b.0.431 with flash tools 7
locked bootloader ,no adb drivers
the .img file in zip not reckognized by flashtool
gimme a complete noob guide if you can
I have a Xperia ARC, after trying to root my phone by different ways, flashing so many roms, I found the way to get it. But not with 4.1.B.0.431, I got it with 4.1.A.0.562 and I have locked bootloader.
First you have to download the 4.1.A.0.562 rom, as I see you know how to flash it. Go to this post: http://forum.xda-developers.com/show....php?t=1598072
and download the rom.
Then go to this forum Thanks to DoomLord http://forum.xda-developers.com/show....php?t=1601038
and there you have the instruction to root your xperia.
Please read CAREFULLY the instructions, download ALL the files it suggest before start the procedure. And in the step 5 and 6, do it as it says, if not you won't get you phone rooted.
Keep reading the instruction in the CMD window during the rooting process specially when it says: Turn off and On USB debbuging.
Please thanks people in the forum I suggest, they were whom really did the job. Hope this could help you.