@Nick2019 Thank you all for your feedback. No the issue is solved. The solution is: in the router I had to choose ports speed as "100MB full duplex". After it router received Internet IP address.

Hi, I have bought this new router instead of my old one. When I connected Internet cable to WAN (blue) port in the router, then after a little time it said "WAN port is unplugged" and led status is...

Hello. Thank you. It worked for me.

Hello. I have Mikrotik router, which is connected to several devices. DECO M4 is also connected directly to Mikrotik. Devices connected to Mikrotik have IP addresses 192.168.88.XXX and devices...

Hello. M4 is dual band device and my phone can also use 2,4 and 5Ghz. How to check which frequency my phone using, when it connected to Deco M4 through WiFi?