@StACO It's not an "issue" per se... Deco usually supports Band 1 (channels 36-48) in 5 ghz, but in some countries/regions where Band 1 is not allowed, Deco supports band 4 (with a firmware update)

@StACO Please provide the firmware if possible, @David-TP 

  @StACO 

Hi, Thanks for the message.

Did all of your mobile devices fail to detect the 5GHz of Deco?

I checked the Deco region code from the local official websites and it is the US version so Its 5Ghz should support both band1 and band4.

I wonder if you run a Wi-Fi analyzer on a mobile phone or laptop, what are the most used wireless channels for other nearby 5Ghz signals?

PS: You can find the current 5GHz channel of Deco under Network Optimization:

Thank you very much and best regards.

  @StACO 

Hi, thank you very much for your time and patience.

Have you checked the wireless channels on the nearby 5Ghz signals? are they also on the band 4(channel 36/40/44/48)？

I think if you change the channel to band 4, the iPhone might no longer detect 5GHz anymore.

Best regards.