@AsadulHuq 

Hi, please reach to the private message for the 1.4.3 firmware for Bangladesh region;

Thank you very much.

@TP-Link Can you please send me a copy of the latest firmware for Bangladesh? My device is Deco M4 (US v2) which is running an older beta firmware for Bangladesh. Thanks.

@AsadulHuq  @shahed3000 I'm also from Bangladesh, using Deco M4R (US) 2-pack V2.

I also experienced the same issue. I was on firmware 1.4.1, and couldn't upgrade to 1.4.3 in any way. I even tried downloading the firmware file on pc and install it manually.

Then two weeks ago, I checked for firmware update in the app & it said version 1.5.0 is available. I updated the firmware & hope it's also available to you now.

@ImtiazAli Thanks for the update. Currently I'm using a beta firmware (1.4.3 Build 20210324 Rel. 63599) which enables 5ghz band 4 channels (149+). After updating to 1.5, are you getting 5ghz band 4 channels?

@shahed3000

The unofficial new firmware 1.5 has been installed on my TP-LINK Deco M4 for Bangladesh region. Seems that the firmware enabled 5 GHz(159 GHz) band. However, once the firmware updated, the 159 GHz has not changed to any other frequency. So, I am not sure whether the firmware can change the frequency automatically as required.

@AsadulHuq Great to hear that 5ghz ,band 4 works in v1.5. As for channel 159, deco will automatically change channel if require. You said "unofficial 1.5", why is that?

@AsadulHuq I've been getting 5ghz band 4 channels since I bought the router (when firmware was 1.4.1).

Also, the update is not "unofficial", we wouldn't get the update if it was!!!

You can see the version history & info by going to the tp-link website, choose US as your location, then go to support> download center> deco m4> firmware