ORBI RKB50 Will Not Connect to Uverse Internet

First, it might help if you told people what the modem is in front of this router. The model number could be useful. Is it, by any chance, also a router, with a set of LAN ports on the back?

That you have turned off the wifi is a clue that it may also be a router. Turning off the wifi does not turn off its router functions. So you may have two routers in your network.

Two routers on your network can cause headaches. For example, you can end up with local address problems. Among other things, the other router can misdirect addresses that the Netgear router usually handles, such as routerlogin.net or the usual IP address for a router, 192.168.1.1.

Unless you have specific reasons for using two routers – to create two separate networks for example – it is often easier to use just one router and then to set up the second router as a wifi access point. Netgear advises this, as does just about every site you will visit.

Sometimes it is possible to put the modem/router into modem only (bridge) mode and then to use the second device as the router. But some Internet service providers, such as BT in the UK, supply customers with a modem/router that just won't work in bridge mode. There may be ways to get the device to cooperate, but sometimes it is just easier to put the second router in AP mode. But that has its own drawbacks:

Disabled Features on the Router when set to AP Mode | Answer | NETGEAR Support

The next issue is that you have posted your message in the section of this community given over to DSL Modems. (This is easily done, given Netgear's impenetrable community structure.) Your device is an Orbi WiFi System. You won't find many people in this section who kn ow about those.

You might get better replies, and find other answers, over in the appropriate section:

Orbi - NETGEAR Communities

There is support for the Orbi WiFi System, including a manual, somewhere at the end of this link:

>>>> Orbi RBK50 | WiFi System | NETGEAR Support <<<<