Default AT&T LTE won't turn on

I've been back and forth with roms trying to fix this. I started in GpE and I could turn lte on but never had signal. I tried a newer radio and still no go. So I went to stock AT&T sense 6 with ruu and now I can not even enable lte. It immediately switches back to wcdma preferred. I am s-off if I need to use that, I just have the boot loader relocked right now. Any ideas?

EDIT: Just tried HBOOT 1.56.0000, multiple radios, and still does not work. I can use LTE, CDMA but haven't been able to test to see if that connects to LTE yet. I am completely baffled by this.

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