Ok I have tried again with profile suggested by you
device: cdc-wdm0
protocol: qcm
ttl: 65
and that made a difference. From 20Mb/s download to 40Mb/s download. 4G connection. That’s with the SIM in the slot. So I don’t think anybody is getting 80Mbs like you suggested. iPhone tethering is still 20Mb/s. I live 150 meters from the cellular tower, so that hopefully should be ideal. My expectation of a router is that its usually capable of passing through what it receives with a little bit of overhead. I think a note should be pinned to your websight mentioning the poor performance of this router. Then customers including me could then make a informed decision. Also tried this with another carrier and a Android phone, and very similar results. Android tethering was 40Mb/s as opposed the 20Mb/s on the iphone 12. Still not what you would expect from a sight that’s capable of 300Mb/s. I would be happy with 80Mb/s download speed but, I cant see this … doing that anytime.