Getting very slow wifi speeds from deco m5
I bought my deco m5 (3 kit) on August 3rd, 2020.
My home is 2000 sq ft
I have 3 floors
I have 1 gb internet from Rogers. Internet speed test on deco is 900 to 930 mb/s.
I have 9 devices connected currently.
Last week I did a speed test and was getting 300 mb/s on my Samsung s20. Thats fine, I figured my phone can only connect to the 2.4ghz wifi.
However today the speed dropped to 15 mb/s! Super slow. I tried resetting my modem from rogers and updating the firmware on deco. Deco is still getting 900+ mb/s, but the wifi my phone is getting is 15 mb/s.
Everyone else in the house is also complaining about slow wifi.
Can someone help?