Ive got a hub 3 and have speeds of about 300 download going through it, however the WIFI signals are not that great in my house as all internal walls are solid brick. My question is if i turn it into modem mode and connect a TP-Link XE75 pro mesh system to it, will i get the wifi 6 from the mesh routers?
Yes, the TP-Link XE75 is a Wifi 6 device. I'm guessing you already knew that ......
It should be a massive improvement over the Hub 3 as a Router 🙂
Yes you will, in fact it looks like that model is WiFi 6e and not just 6. But do you have client devices which can use WiFi 6 or 6e? Also the limiting factor is the broadband speed, if you have a Hub 3 then that indicates that you are on the M500 tariff or lower, so irrespective of how good the WiFi speed is, no device will connect to the internet at faster than that speed.
Im keeping the 6 band for just the mesh routers to to each other to keep that traffic clear, the main reason for the mesh is to ensure i have no dead zones of wifi, im currently using Devlo Powerlines and a powerline wifi but its not solving the overall wifi issue
PLA's are not all they are cracked up to be. I would only use them as a last resort.
Personally I use PoE Access Points to service my wifi needs.
Your device has a dual band Wi-Fi adaptor - on the 2.4GHz band 50Mb/s is quite typical and on the 5GHz band you see 300. The device makes the choice of band to use ... not the Hub / Router / Access Point.