My Archer c6 doesn't even give 20 Mbps download speed.
I bought an Archer C6 around June 2020 to support my 150 Mbps connection from Act Fibrenet because my old router only supported till 100 Mbps. As soon as I setup the router, I did a speedtest (by Ookla) and I got exact 150 Mbps upload and download. I was very happy to see that.
Around mid November, my online classes started to lag, so I did a speed test again and I was shocked to see only 10 Mbps! I thought it was the ISP problem so I called their engineer and he checked the modem and all connections and everything was fine! He told to contact TP link support, so I went to my TP link authorised service center in December in Hyderabad and described my problem. They took the router and they told me they'll give a replacement, I was very happy, I got the replacement around 2nd Jan and when I tested the speed, I was shocked to see that it was still the same :(
I didn't know what was wrong so I called tp link via phone, he told me change the channel and MHz but that still didn't change anything. I'm still getting very slow speed and with my old D-Link router I'm still able to get 100Mbps which is its limit. Please help me.