Xbox 360 network settings zeroed

IP address of the hotspot is the gateway

IP address of Xbox360 is in the gateway's subnet (ie if gateway ip = 192.168.0.1, ip of xbox should be in this range: 192.168.0.2 - 192.168.0.254). This IP is often assigned automatically by DHCP on the router/hotspot. Only set it if you need a static IP.

Subnet mask for home networks is often 255.255.255.0, but depends how many devices are on the network. Use that with < 255.

Primary/Secondary DNS is often set as/inherited from the gateway IP, but you could set it to public DNS like Google (8.8.8.8 and 8.8.4.4)

These settings should be set automatically for you when you join the hotspot's wireless network.
Is the Xbox 360 joined to the hotspot's wireless network?

On the Xbox 360, you should be able to select the wireless network name (SSID) from a list and enter it's password. You set SSID and password when you set up the hotspot on the phone.

more info on Xbox 360 wireless networking here:
https://beta.support.xbox.com/help/xbox-360/networking/configure-wireless-settings

Do you have any other devices that can join this hotspot? Would help to determine if problem is with Xbox or hotspot.

Thank you for your answer!

Unfortunately, it is still unable to connect.

Yes, other devices can connect to the hotspot. I actually used my chromebook to verify what gateway and IP address it was using through the hotspot, then used that gateway value and a slightly different IP. Still nothing.

Yes, my hotspot network is visible on the Xbox and my password is valid.

This seems to be an XBox issue, yet none of their technicians have been able to figure it out (via calls and chats).

Going forward, I can think of two solutions.
1) I need to also fill out the values listed as Additional Settings. These are:
PPPoE Username, Password, and Service Name. Also Host Name.

2) Something seriously wrong must have happened for this to get to this stage. If I can find out what caused all these values to get locked in at zero, I can possibly address it.