Generic firmware for C2004

[lrms]

My phone (Xperia M C2004) is unlocked but came with a carrier custom "splash" screen and other apps I don't need or want. Is there a way to revert to a "generic" Sony firmware, not "branded" by any carrier?

Thanks,

[Uliwooly]

@lrms

yes you can use flashtool

from this link 

/t5/Xperia-Z2/How-to-manually-update-downgrade-root-2014-Xperias/td-p/593459

and the FTF file from this link

http://forum.xda-developers.com/showthread.php?t=2532190

http://forum.xda-developers.com/xperia-m/general