TP-Link wrote @Xijinping Hi, I see you did fix the speed issue by using a different Deco as the main Deco on the other posts, right? After switching the main Deco, now the speed issue is back again?...

@Xijinping I am experiencing the exact same thing! i have 400 MBPS down with spectrum coming from a coax line. When hard wired to the Deco S4 on 1.5.0 i am getting speeds of 50MBPS Down which is...