[Q] Unlocked Rogers Moto X having LTE problems on AT&T topic

I bought an unlocked Rogers Moto X to use on AT&T's network but after fiddling around with the APN settings I'm still unable to get it to connect to LTE. HSPA works fine.

I called AT&T and they said they were unable to recognize my phone on their network that's why it cannot receive LTE?

I'm not sure if the previous user had modified the software so I'm attaching the about phone here.

Thanks for everyone's help in advance

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