@goodevil This firmware include all region codes around the world and you can install this firmware manually by using Web UI because they did'nt post firmware on all region websites because (EN)...

@David-TP I did that same thing on Deco M4.

@wmosquini Check QoS settings if the speed limit is set you can turn OFF Qos Settings or change the speed limit to 1000 Mbps.

@ImtiazAli Working but still same.

@ImtiazAli Yeah performance is much better.

@wmosquini You can download the firmware 1.8.1 from the link below. https://www.tp-link.com/en/support/download/deco-m4/v2/#Firmware