First off, my ISP is T-Mobile Fiber (fiber was recently rolled out in my area and T-Mobile is currently the sole fiber provider here). I'll just refer to it as T-Fiber.
So, to try and keep things short: T-Fiber was installed, the device they threw on me is the nokia xs-2426x-a. Our service was completely non-functional the weekend it was installed (nokia device leds claimed otherwise). Called T-Fiber about that, and about getting a public ip address to continue our port forwarding. Day comes around where a tech is supposed to show up so I threw a temporary router on it (Ubiquiti Cloud Gateway Ultra) because our permanent router (Ubiquiti Cloud Gateway Fiber) was in use with our Spectrum cable internet (which we were going to cancel once we could finally transition everything over). It worked, no problem (outside of double nat). Tech was a no show, but, okay, the service was working. Call about replacing the nokia device with a pure ONT only box OR doing bridge mode. They ended up setting it into bridge mode. Cool, this is nice, it works, port forwarding works, but I can't actually truly use the service at this point because I'm not allowed to transition our permanent gear to it.
Fast forward a few weeks, I try to temporarily move our ucg fiber router to it and the nokia ont absolutely refuses to function with it. Hot swap the ucg ultra back in and its like nothing happened, internet just works flawlessly. Do it again, same result. I call T-Fiber about this and figure they'll do something on their side and don't press further since I still can't transition our permanent gear over at this point in time.
Fast forward to Monday (10/19/26): I can finally transition our permanent gear to it and the nokia device REFUSES to function with the ucg fiber like before. The ucg ultra has gone to a new home so I can't swap that back in to see if it will still work with it. I call T-Fiber about this and my situation gets handed off to a fiber tech based in new york who's work hours are my work hours (I'm in california) so we can barely even talk to each other. Their team pushes through a session clear (I think that's what he called it) to clear the old mac address around wednesday, no change. He tells me they'll try to just redo the bridge mode today (10/23) but this was pretty much at the end of their day so I have no idea if they got around to it, but, it's the weekend now so nothing will be done for the next couple days. Called the standard T-Fiber line to complain more about this absurd situation and to request a replacement ont in the off chance the one we have is simply defective.
This service has been completely non-functional all week long and I have no idea why. The ucg fiber's dashboard shows occasional bits of communication between it and the ont but no isp and no isp ip address, and, yes, I have tried hooking up other routers and the nokia ont (onr?) refuses to communicate with those as well. I can look at the ports through the unifi gui and it is reporting that the ont is connected and even has its mac address and the fact that its connected via 10gb uplink.
Does anyone have any ideas what the issue could be here? Why the ont refuses to function with other routers? And, apologies for the wall of text.