Hi, 

I'm a little confused. When I check the firmware version of my Deco M4R's via the webdased interface I see that the latest firmware version is: 1.4.3 Build 20200918 Rel. 74289. On the TP-link website I see a firmware update of Deco M4(EU)_V2_1.5.0_20210511. 

What is the latest version and which version should I install on my Deco's? 

In addition, I am unable to perform an update check via the app on my phone. I keep getting the message "Unable to check for update". How can I fix this? I use a OnePlus 6T. The App version is 2.7.9. 

Thank you very much for your quick help!