recommended pureness rom
http://forum.xda-developers.com/showthread...ghlight=upgrade

im using version 12 now
to upgrade version 13, do i need full wipe?
anyone know?
dunwan install all apps one by one again 

from this step, which one i can skip?
1.Factory reset in cwm
2.wipe cache partition
3.wipe dalvik cache
4.Format /system (in mounts and storage)
5.Format /cache
6.Format /Data
7.Install Xperia_Ice_Cream_Pureness_build_13.00.zip
8.Install patch for your phone model
9.Reboot now and you are done