How do I use my rooted sprint Samsung S5 sport with AT&T?

[AC Question]

I have an rooted Samsung S5 Sport. I have a valid sim for this phone but AT&T couldn't get it to work on their network. I know the root is good. And the phone will work GSM networks. But don't know how to make it work with AT&T

 

[Jaime Andres]

You need to set your bands in dsm..that would do

 

[Jaime Andres]

You need to set your bands in gsm..that would do