internet connection problem - hardware or O/S?

Mike Easter wrote:

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If the gateway device were my own, I wouldn't necessarily replace it
with my own money because I could get around the problem of having
enough ports some other way. I don't like to spend money unless I
have to either.

It's hard for me to say if I "own" The Gateway device or not. AT&T
provided it "free", including installation, as part of their customer
retention program when I switched to AT&T Uverse internet service from
AT&T's DSL service. All I know for sure is that my monthly bill does
not list a separate line item charge for the router.

Still, it'd probably be useful for me to see if AT&T would replace it
because I'm guessing that the wi-fi component of the router uses the
older 2.4 Ghz 802.11 (??) speeds. IIRC, 802.11ac wasn't available back
then. Of course, the one wi-fi device I use (a TCL Roku TV) is limited
to the 2.4 Ghz speed LOL.

Regardless, thank you for taking the time to read and respond to what
was undoubtedly a long-winded recap of the steps I took trying to
troubleshoot a network connection problem and narrowing it down to a
hardware issue invovling the router, and eliminating both the mobo
hardware and a O/S update as culprits.

John

Yes wrote:

AT&T provided it "free", including installation

You might ask tech-support, what their upgrade policy on routers is.

https://forums.att.com/t5/AT-T-Inter...s/td-p/4813917

The 589 is a b/g/n 2.4 wireless not a dual band.

The 599, 5268 are dual band b/g/n/ac wireless.
Released summer 2015, initially used for GigaMarket
accounts but being used on non Giga accounts now as well.

This is the spec for the 5268AC.

https://www.arris.com/globalassets/r...ets/5268ac.pdf

And this is the Arris(Motorola) 599 for comparison.

https://www.dslreports.com/r0/downlo...ta%20Sheet.pdf

Paul