As above, I get the same results from a speed test on my phone via wifi and on my laptop connected to my LAN. My wifi connection to the phone is running 1.2 Gbps but my LAN runs through a 1Gbps switch (I believe the LAN ports on the Vodafone Gigabox are 1 Gig anyway). So in my setup, my wired connection will become a limiting factor before my wireless will.What speed are you paying for? If its a 250mb connection and you are getting the full 250mb on your phone then its properly configured and you are close to the router, if its a 500mb or 1gb connection its a different story and the only way to test the actual speed being provided to you is test the wired speeds.
The phone negotiates the frequency & channel with the router. If the phone isn't negotiating a 5GHz channel when available on the same SSID, then it's a very old phone or it's not using the default settings.Who said people were using 13 year old phones that support 2.4ghz? you arent understanding my post, im talking about what the router is doing not the phone.