My Deco is giving terrible speed to some devices
When first installed, a couple of years ago, by Deco was working just great. Now it is just completely unreliable and unpredictable.
I have one E4R connected via LAN to the modem, and the other E4R is connected wirelessly to extend the range.
Sometimes I have two different devices connected to the same unit (it can be the main unit) and one has 80 Mbps speed and the other 2 Mbps. The next day they might swap and other device will get a low speed.
My phone for example is getting massive fluctuation of speed throughout the day, usually being very slow in the morning.