@Sunshine Thank you for the reply. I got this Archer D20 last week and connected to my main router through 10/100 EWAN port as a Wireless Router Mode. Main router is capable of 100Mbps/20Mbps. This...

I was going through "Archer D20 AC750 Wireless Dual Band ADSL2+ Modem Router" user manual and found that Downstream data rates up to 24Mbps, upstream data rates up to 1Mbps. And also it mentions that...