as posted, this thread starts off with the settings...
AT&T ZTE Mobley USB Tethering ASUS Router and probably others!
hook ethernet cable between asus using one of the lan ports , and other into lan on computer/laptop.
use a usb cable from the Mobley to the usb on the asus
use a browser to log into the asus with it's address,,, maybe 192.68.29.1 (which was the asus label)
follow these screenshots for the USB tethering settings:
View attachment 509161
View attachment 509162
View attachment 509163
then i had to pull my ethernet cable, and reboot both the mobley and asus,
it takes quite a few minutes for them to reboot and find each other,
then try logging in with the browser over wifi.... and you should see
everything connected, and the mobley listed as it's 3g dongle