i had my faulty 635 router relaced with the 633 and now my download speeds over wifi are only 30m max i used to get 35 to 37.
with cable it is 37m. i've only had it a month and it hasn't improved.
if i connect my 533 with open reach modem i can still get 37m over wifi.
i've tried all the different channels and left it on auto as it's no different