I've run the xfinity speedtest on my iPhone 12 Max several times, and I'm getting much slower speeds (<30 Mbps) than my iPad or MacBook Air (100Mbps+) which are all on the same network. Tried all standard troubleshooting (restarted modems, restarted phone, reloaded phone iOS)
Tested phone on other home networks; it got downloaded speeds of 100Mbps+, so not the device.
Only thing I can think of is firmware upgrade to router? Thoughts?