I used to get speeds around 26 meg on fiber optic, then my speed droped to slower than .4Meg. After a few phone calls Talktalk sent a new router so I dont now have to plug that in via the BT box they supplied with the old router. It came this morning I have set it up but there is no improvement. I phoned & they checked the line. They say no faults & I need to give the router a few hours to speed up. Is that right?