Recently had a speed upgrade from 100/20 Mbps to 300/100 Mbps. Upload is fine when doing speed test but download only goes upto 150 on RT-AC68U. This is with wired connection, nothing else connected and also tried speed tests within the router. Have been trying to troubleshoot with ISP until someone recommended to try another router which is a Vodafone ultra hub plus and the speed when using that are 320/105. Is there a setting that I need to tweak?