[Q] AT&T Galaxy Tab 2 10.1 - No JB update, want to root and update/flash

Am I in the right spot? I could not find a forum for the Tab 2, even though they're very similar.

Are there potential LTE/AT&T connectivity issues with flashing a new ROM on this tablet?

I have an AT&T S4 and they were practically giving away the Tab 2 so I figured why not, but AT&T is the only provider yet to update to even 4.1.2, so I need to do something. But I'm afraid of losing my LTE plan with a new ROM and have no experience rooting my devices. My S4 is still stock TouchWiz.

Sorry if I'm in the wrong spot - if I am in the right spot, anybody wanna shoot the **** with me about what I can do with this thing?

:)