t mobile galaxy s4 M919 unable to update

[Genisis Shuks]

i've searched for the update on the internet and from the phone it self, on the internet its basically a run around, searching from the phone it self, the phone tells me that "no updates found, you system is modified" running on OS 4.3

 

[Sheldonh50]

Hello. Any luck finding that file? if not I have the stock firmware to upgrade to 4.4.4 for the T-Mobile s4 SGH-m919.