@Kevin_Z Thanks for responding to my post.

I tried Client mode most recently. I had tried Range extender mode too. In neither mode did the TL-WR802N find the ATT hotspot. I did make my iPhone available as a hotspot and it sees that, but not the ATT hotspot. I am wondering if the ATT hotspot is too old? The hotspot looks like this

and the article that references it is dated 2015.

I have an older TL-WR802N that I used at the other house to connect a Verizon Jetpack to my plex server. That was a quick and simple process, but I was basically using it as a bridge between the Jetpack and the plex server which lacks WiFi capability.

We have a house with several levels and thick walls... the WiFi can't seem to get through the walls. All the devices have ethernet run from a central location. My thought was to use the TL-WR802N to connect the hotspot to a real router then out on CAT5 to all the devices. Also the AC1200 is has better wifi than most because of the antennas.

I will work through the instructions at the link you sent. This is really not what I want though. I don't want the devices connected by WiFi but though CAT5.

  @KirkDickinson 

You should be able to get it working in Client Mode (wireless bridge).

ATT (((wireless))) TL-WR802N <--ehternet--> AC1200 ((((wireless)))

                                                                      ^---ehternet--> devices

The AC1200 should be setup as a wireless AP.

However, getting connected to the ATT hotpspot without using WPA2 vice WPS looks like your sticking point that needs to be addressed with hotpot manufacturer.  Is the SSID broadcast from the hotspot?  Is their a web GUI you can log into to set a paswword for WPA2 connections?

It looks like the password and SSID are on the front screen of the device.  In client mode, just plug those setting into the wirelss tab on TL-WR802N.