Changed Out The Motherboad From My S6 To A New One No Working Samsung Galaxy S6

Chosen Solution

Hi Guys , I changed out main motherboard from my Canadian S6 to a AT&T american board . I get signal and everything but cannot place a call, i figure it is because it is a USA board . Any ideas how to make this work or am I SOL ?

i would think it would be the antennae not working with the different motherboard??