Why in the hell is T-Mobile getting a Stagefright patch before vanilla h815?

I just dont get it. The device manufacturers always want to blame the carriers for patch delays. So here I am sitting on my international H815(eu) figuring since this is a broad scope device it will get the update before the carriers specific devices. Then today I see T-Mobile's model is getting a stagefright update. WTH?!!? Anyone got any good insight on whats going on here?