Originally Posted by jd1639
Dude, I don't get what you're asking. Do you have a hardware issue or a software issue. Odin will flash the modem if you can find the right firmware for your device
The link deadlysin9 gave you is your only hope
Sent from my Nexus 5 using XDA Free mobile app
He's saying that in the thread I linked it mentions that the modem included doesn't work on ATT I337Z, and that seems to be the only available firmware.