Exclamation [Q] M919V 4.3 Problem with MK5 firmware

Ok,

Here's what I came from.

I've installed the new 4.3 darkstalker X rom for s4 international.

I had the AMG1 firmware and the network wasn't working right.

So I had to flash the MK5 modem, it did work but now the sound is not working anymore.
I tried to flash the whole MK5 firware, now I still have the same probleme.

I'm trying to download the AMG1 firmware (8 hours!) on sammobile but each time it crash (the download). I've tried 3 times...

I'd like to have a little help on this.

Anyone got a fix?
Anyone got the AMG1 modem?
Anyone got the AMG1 firmware?