I have the bt hub6 and used to be fine, until they made this halo 3 and fell as if they have slowed down my wifi, to the point that it becomes unbearable, however when we complained, the wifi went faster, but has slowed down now to its slow state before. Ps i had to use my 4g to type this
Can you connect by Ethernet and see what the speed is? If you go to Fast.com, can you post your upload and download speeds on wifi and then on Ethernet.