@Alexandre. Thanks for the tip. I checked and unfortunately the M4 does not have this feature. This feature would help me tough, so upgrading my system would be an option.

@ThatCopy I have 3 Deco M4's and I also ran into similar problem. I use it in router mode and I have a few products that only support 2.4Ghz, like e.g. apple watch, wireless printer, etc. The rest...