KVD21 gateway - Wi-Fi 4 (802.11n) when connected with the 2.4 Ghz band?

I also own the Arcadyan KVD21 5G Gateway. Unfortunately, my gateway will only connect to 4G LTE even though there is 5G available on the tower I connect through. I get three bars and anywhere between 50-70 Mbps download. That's plenty to run the 40-some devices I have connected to the Internet, including 3 Macs, 2 iPhones, 2 iPads, 3 TVs (all streaming), 2 printers, and a myriad of Amazon Echos and their associated devices.

Every single one connected without an issue except the Epson printer. Once I cancelled the existing network configuration on the printer and reestablished the connection to the new gateway, it behaved as expected.

All I can say is that my experience with T-Mobile Home Internet has been positive and if it remains as reliable as it is now, I wouldn't hesitate to recommend it to anyone.