Hi, thanks for sharing the firmware. New firmware 1.5.1 is working fine and I can use band 4 channels on 5ghz. Thanks again.

@TP-Link I'm a user of Deco E4R which I bought two years ago. Initially, this deco doesn't support 5GHZ, band 4. After giving the 1.4.1 update, I could use 5GHZ. Recently I updated my deco to 1.5.1....

After this update, I can't use 5GHZ on any smartphone though 5GHZ is on from the router. Channel of 5GHZ stay below 50. Is there any solution for this?