Given above is a picture of the back of my Deco M4 (Hardware V2.0). I am on Firmware Version 1.4.3 (as mentioned above). I am from India and the latest firmware version has not been released on the...

@Alexandre. BTW, the 100Mbps speed could be because you are using the E4 as the main deco connected by Lan cable to your router. The E4's ethernet ports support only 100Mbps. That's why I am using...

@Alexandre. That speed of 867Mbps is for 5GHz 802.11ac. I'm asking about 5GHz 802.11n. I. e. the client device supports 5GHz, but only 802.11n and not 802.11ac.

If I have a device with 5GHz 802.11n WiFi adapter, what is the maximum theoretical WiFi speed that the Deco E4 can provide?

Is it possible to subscribe for email notifications of new firmware releases of the Deco E4 (hardware V1) and Deco M4 (hardware V2)?

@TP_LINK is it save to update the E4s to the Apr-21 firmware when the main M4 is on the Oct-20 firmware?