Default [Q] Need help with s5 rom APN fix

Okay well i downloaded this s5 rom port for AT&T]
I found that it worked on our phone from but this post isnt very active

So i flashed the rom and everything is working perfectly so far. Except i cant recieve or send calls or texts and im not getting any data. When i try to edit APN MCC and MCN make the apn dissapear. Is there any other way to add a apn and make this work. These S5 features have gotten me spoiled.