Use this method.
Originally Posted by Rrazorr
Hey I just bought Xperia M dual 2004, updated it to the latest firmware i.e 15.2.A.2.5. but now i want to root my phone, and I can't find any specific thread to root this firmware, I don't wanna take risk of rooting it with any unsafe method. So if anyone can guide me to root this model would be glad..
Thanks In Advance..
Goto cydiaimpactor . com (Remove The spaces)
1) Download and Install the tool.
2) Connect the Phone with USB Debugging Mode On.
3) Start The Tool and Press Start.
4) Your Phone is now rooted
5) Install Superuser form market and install Busybox
THIS METHOD WORKS FOR XPERIA M SS/DS ON THE LATEST FIRMWARE