One of X20 twin pack can only connect viable 2.4ghz
Hi there please help. I recently bought a twin pack deco x20. Connection is modem to deco A then ethernet backhaul to deco B. My devices plus deco all updated to latest firmware as of 15th Jan 2022.
My Samsung s21 ultra and other ax device can only connect to deco A using 2.4ghz not 5ghz. If I go upstairs to be near to deco B, it will switch to 5ghz. Basically after much troubleshooting including swopping the 2 decos, same result. If I only enable 5ghz and disable 2.4ghz via deco app, my device only connects to deco B. So if there's no signal from deco B, I will lose internet connection or always connected to deco B with weak signal, though on 5ghz. This leads me to conclude maybe deco A is faulty? It's attena or chips cannot support 5ghz. Am I right or is there any settings or test I can do?
If I enable both 2.4ghz and 5ghz, then if I am near deco A my phone connection will be 2.4ghz connected to A. If I am near deco B will switch to 5ghz connected to B. Hopefully the admin can help me. Thanks.