I actually figured it out from a video. Instead of typing ATT in the APN section, I typed in BROADBAND and it worked. In the instructions on the paper it says to change the APN to broadband after changing the APN title itself to ATT which didn’t work even after I rebooted the router. Overall the paper in which gl-inet gave me was some of the worst instructions ever. For some reason I can’t get pictures to load here of the page but when the instructions start off by saying “network settings” there is no tab saying networks settings or nearly any of the steps on the paper.