Is it the speed you get from the Deco M9 plus or it is the speedtest results on Deco app? If it is the speed test on Deco app, connect your computer to the modem and main deco by wired cable to do a...

as far as I known, to ensure the performance, we'd better plug the adapters in the same ring main; while considering the actual demand, try to plug them into different ring main without plugged into...

Do all the devices have the same issue？ or just some of them? Tried to forget the profile and reconnect to the network? What happened?

Steff555 wrote Same behaviour: I have 4 HS110 (1 version v1 and 3 version V3) I can confirm that "feature". I write feature, because this happens since firmware version 1.5.4 (for version V3). With...

jazzy wrote it's impossible to downgrade the firmware... Hey Jazzy, do you have the same issue? failed to downgrade firmware?

Well, seems that not much can be done; what about other devices and other internet activities? Do you have the same issue? If it still the same with wifi settings optimized and UPnP enabled, you may...