Hi! I have 4 deco x55, they are all wired to tp link switch and all of them are set in access point mode. However one of them is giving me max 70-80mbps while others providing 180-350mbps. What could

Hello! i got 2 sets of 3pack deco x55 and i want to sell one unit as i only need 5 of them. My question is : can person connect one deco unit via wifi and set it as AP or Repeater/Extender?