Max BR1 - AT&T - issues with band 12

i am running a Max-BR1 with 7.1 firmware. I am connected to band 4. I am getting about 2-3 bars of signal and for where we live, i am lucky for that. One thing i noticed is that on band 12, i get 5 bars but the internet won’t work. Any thoughts as to why? I am not a radio engineer so please be gentle.

Thanks in advance!

Band 12 is a lower frequency that travels farther. It has very little bandwidth assigned to it and is used to give phones far away from the tower the ability to make calls and receive messages.

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one thing i realized is ping times are horrible -

Ok that explains it.