I have TP-Link Archer T3U which never picks up the 5Ghz band with my TalkTalk network using gateway eero 6. This is despite loads of other devices finding it easily including my old laptop. I am happy to buy another usb3 wifi dongle as long as I know it will work (already bought 2 that only connect to 2.4Ghz). Can anyone recommend a wifi dongle usb 3 that will definitely work with the gateway Eero 6 and I will go and buy this tomorrow!? The 2.4Ghz is like 4-10 times slower than the 5Ghz wifi!