So I was excited to receive my new Deco M4R mesh wifi system. I immediately installed the new wifi system without issue. After installation I started testing speeds. OMG, like many others out in the world my internet wired speed was cut in half. I pay for 200mbps and I was only getting 100mbps. Boy did my heart sink. I tried various things that others tried on the forums. Long story short, the ethernet cable that came with the system was bad. Once I replaced that cable with another that I had, BOOM the rocket took off. I'm a happy camper now. NOTE: Once you change out the cable, reboot modem and computer.
Jr from Atlanta, GA