I flash last ftf .757 us costumized and sus gave me this 4.4.4. update. i'm only sure it is unbranded.
With last flashtool I get the ftf and upload to mega.
It was verified by me and work properly
After you flash it with the last flashtool. you can root it by your self following the instructions in this tread:
Now if you wish to deodex follow this tread:
Sorry about my really bad english