I have Infinity 2 and at first got speeds of 59mb, the max my line could hold, then it crept up to an amazing 73/18mbs and held there for several months, now a BT engineer came out to fix a line fault and replaced the master socket, not Im only getting 46/11mbs I called BT but they say its a good speed, They said they will reset my line, but im not holding out much hope