Unlocked Lumia 920 Network Question

[NutmegState]

My first 920 screen cracked. Then the GPS died and I was having other issues

I finally found a Unlocked 920 for $250. The phone arrived, and I popped out the SIM from one and put into the other.
Everything is great, apps are downloading etc.

The only thing I do not know what to do is to set the carrier network

It gives me the option of
AT&T 3G
AT&T Lumia LTE 1
AT&T Lumia LTE 2

What do I choose or how do I configure?

 

[pankaj981]

Set it to automatic under cellular settings and LTE1/LTE2 under access point.

 

[NutmegState]

Thanks for the reply. That is what I did. Kinda funny it was like crickets when I asked at the AT&T store