I've seen that this AMC has theaters underground. While I don't condone being on your phone in a movie, if I needed to check email updates for work quickly while in a movie, does this theater have wifi access or any signal?

AT&T does not work downstairs and at present there is no wifi.

i am not sure...

No wifi, but T-mobile's data works in the lower level.

Your phone will work , mine did when I stepped into the hall way to answer a call and send a email...

It should

No wifi but your phone should work fine.