Actually BT internet is slow you say problem with this or that i've been in many houses and all internet problems are been with bt and never other internet providers ... people wants to use their wi fi and use internet, BT internet is just the oposite of their adverts . For sure is the slowest in UK and for sure you have to do something about it ... see how much people pay for nothing . i have the same problem now, and can't see other solution then switching to someone else ...
Have you tried the quiet line test dial 17070 option 2 you should hear no noise if you can hear noise then it needs reporting to BT faults on 151 with no mention of broadband in the call are you connected to the test socket using a new filter
if using a hub 4 locate these lines located in the hub logs Lines should look like this 19:11:29, 07 Nov. (2290101.460000) DSL noise margin: 7.00 dB upstream, 6.10 dB downstream 19:11:29, 07 Nov. (2290101.390000) DSL line rate: 448 Kbps upstream, 288 Kbps downstream
if u The stats for the Home Hub 6 can be found on the Information page from http://192.168.1.254 then Advanced Settings -> Technical Log.
Can you run this checker and post back a screen shot of the results. Make sure you delete your phone number before posting.