Hello, Im from Bangladesh. I wasn't getting 5ghz even though my phone supported 5ghz. My router was Deco M4 where my firmware was 1.4.3 Build: 20200918. So a local tech support guy from TP-Link helped me with it by giving me a firmware file which was I suppose the Beta firmware you are talking about. So it was all good for a day then suddenly my M4 stopped working. DHCP wasn't working so none of my devices couldn't connect. So I had to reset. It was working fine for a few days but then again this happened today. I am not getting any new firmware updates. My current firmware version is 1.4.3 Build 20210317 Rel. 03630. What should I do now?