@ryg No everything working fine for me. You can install this old beta firmware 1.7.0 which was released in January 2024...

@ryg Do factory reset and do the setup again and use Deco M4 as a (Main Unit) and then install the firmware by login the Web UI (192.168.68.1) and when the beta firmware installed successfully then...

@ryg I think your Deco M4 is V1 not V2 please check it again and send me the picture of the sticker below on Deco M4

@ryg Maybe your PC changed the file format thats why i said try on your mobile phone also can you attach a picture of your Deco M4 sticker which is down below on your Deco M4 which version you have...

@ryg I saw the video but you can do it on your mobile phone now not PC

@ryg You can download this (.bin) file from my email on your mobile phone and then update the firmware from Web UI by using the Google Chrome Browser on your phone by following the same steps you do...