Made a big difference,
Verified Purchase(What is this?)
This review is from: BT Compatible I-Plate Interstitial Plate - ADSL (Electronics)
Took five minutes to install this - take phonepoint faceplate off, fit this, put faceplate back on top of it. You just need a screwdriver. Then reconnect your broadband router/modem. It can take a while for the router and ISP to renegotiate the speed - I forgot about it for a few hours. When I next checked, speed was up from less than three megabits to nearly four. I thought that was pretty good. Now, several days later, speed has risen to over 4.7 megabits. Makes a big difference for bandwidth-hungry uses like TV-on-demand. Definitely worth the money for me, but I understand it doesn't work on every phone socket.