@Heidi_Alp yea but if t3u plus and my router support b/g/n why not working in full speed i mean only if i switch from 20MHz to 40MHz in my router but not sure if stable. wn722n(v1) with 20MHz works...

Hi, I recently bought an archer t3u plus and noticed that the internet speed is 4x slower than it should be. It probably doesn't use 802.11n, but when I try to switch the mode to 802.11a/n or...