I fitted 3 BT Extenders, they worked some of the time and were hopeless most of the time. My solution was cheap as chips buying a couple of BT Hub 5s and making them repeaters. I have one fitted in the attic at the opposite side of the house from the main router and am now getting a speed of 50Mbps where before I was getting 2Mbps. I fitted the second repeater hub to an outbuilding and the speed there is 57Mbps. Here's a link detailing how to set up the BT5 hub as a repeater. https://m.youtube.com/watch?v=FcAZ7zI0iNI
I fitted 3 BT Extenders, they worked some of the time and were hopeless most of the time. My solution was cheap as chips buying a couple of BT Hub 5s and making them repeaters. I have one fitted in the attic at the opposite side of the house from the main router and am now getting a speed of 50Mbps where before I was getting 2Mbps. I fitted the second repeater hub to an outbuilding and the speed there is 57Mbps. Here's a link detailing how to set up the BT5 hub as a repeater. https://m.youtube.com/watch?v=FcAZ7zI0iNI