i flashed my back up ftf 4.2.2 PH version and now pc companion is still downloading the firmware. will create ftf once done. but dont know if i can upload it because my net is too slow. maybe you can download PH 4.2.2 ftf here and flash it to your phone.
http://forum.xda-developers.com/show....php?t=2469191
look for : C6903 14.1.G.2.257 Generic PH 1276-7935_R4A

Xperia Z1 running mharckk v1
Xperia S running mharckk v2
PROUD USER OF XPERIA PHONES -_-