@Kevin_Z thanks for your response, I guess TP Link lied to its customers by advertising speeds 5 GHz: 1300 Mbps (802.11ac) 2.4 GHz: 450 Mbps (802.11n) for the Archer C59 V1.

@Kevin_Z I have started a thread with no response here https://community.tp-link.com/en/home/forum/topic/585580, " Slow wifi download speed archer C59 ") after my experience with your tech support...

A week ago, I upgraded my comcast xfinity internet service to 200 mbps download speed, but i have not been able to see any improvement in speed through the archer C59 router. When connecting the...