I just switched from Comcast to AT&T fiber, 2 Gb using a Humax BGW-320-500

---

Dan007 wrote:

I moved the orbi router back to the closet, hooked up directly to the at&t router via ethernet along the house.  Since the network has been back up, two issues.  the periodic slow down in upload vs. download still exits (router speed tests will show as little as 150 up with 2200 down even though the test at the at&t router has virtually symmetric up/down) and now a bunch of smart devices can't seem to connect (about six or seven Kasa switches,

There will be some speed loss due to double routing (Double NAT) but that shouldn't account for 2200 up to 150 up.

I don't know what wrong with your wireless device connection issues (Kasa switches and your iPhone).  Did it get better after you restarted your Orbi.  I find that sometimes my Orbi 960 wireless gets into a state where I cannot connect because it says wrong password.  When that happens I have to reboot the Orbi.

What security option did you pick for your 2.4Ghz IoT network?  I suggest WPA2-PSK [AES].

What security option did you pick for your main 5Ghz wireless network that your iPhone is connecting to?  I suggest WPA2-PSK [AES] + WPA3-Personal [SAE].  Is your iPhone less than an iPhone 15 Max?  Then it cannot connect to your 6Ghz network and will use the 5Ghz network.

You might have wireless congestion and could improve things by selection specific channels for your 2.4hz and 5Ghz bands, but I don't think congestion would explain what you described (iPhone takes many minutes to connect).