@djlimlee From the version number, it looks like you have a customized firmware (from your ISP or the company you brought the Decos from). If that's the case, then you have to contact them for the...

@Hispanico No. there's no difference in internet speed in 2.4 Ghz band in these models (max 574 Mbps)

@djlimlee Update the firmware of both Deco models to latest version. Also, check for updates of the Deco app.

@Sonic1985 Selecting signal source manually is not yet available for Deco E4, but it'll be added via a firmware update in the future.

@Dagoy Multiple things to keep in mind here: The latest firmware for M4 (V2) is 1.5.5. For V3 it's 1.5.1 afaik. You need to update the V2 model and V3 models separately via web ui. However, it looks...

@Papaey M4R is the name for all Deco M4 models. Check the bottom of your M4. It should say "Ver.: 2.0" or something like that. That's the hardware version.