Hi there, thanks for a great site,I have looked around here and found several tutorials on debranding xperia's, but none on debranding the experia j,if there is one and I missed it, please send a link, if not would you consider posting one?Basic details are:xperia j, st26i, running jb 4.1.2, build no.11.2.A.0.31, Thanks again.
The method of debranding is pretty much the same for any Xperia device. You just need to ensure you have the right FTF firmware file.
