Help Oppo R11 Plus wont recognise Smart doorbell

[David Grieve]

My Oppo R11 Plus is running Android 8.1.0, connected to EE Fibre Broadband WiFi Router set to 2.4Gz band only.
I bought an "XSmart" video doorbell, Model # X20D00H002 last month. (2.4Gz band working only)
I've tried using the manufacturers recommended Play Store Android App for the video doorbell ( "Ubox") plus another App advised for the "XSmart" models on YouTube ("XSH Cam") with ALL the settings correctly inputed but am having problems.
On both Apps. when "adding new device" (the video doorbell) I can use the displayed "QR" code to get the doorbell to connect itself to my home EE Network, but boths Apps then fail to recognise the doorbell as a new device and add the doorbell to its' list of devices. Tried countless times with no success.
I even tried downloading both Apps to my wife's Samsung Galaxy A10 phone, with the same failures.
Has anyone else had similar problems, and how do I get my Oppo phone to recognise the Doorbell as a new device? Thanks! David (UK).

 

[mikedt]

My Oppo R11 Plus is running Android 8.1.0, connected to EE Fibre Broadband WiFi Router set to 2.4Gz band only.
I bought an "XSmart" video doorbell, Model # X20D00H002 last month. (2.4Gz band working only)
I've tried using the manufacturers recommended Play Store Android App for the video doorbell ( "Ubox") plus another App advised for the "XSmart" models on YouTube ("XSH Cam") with ALL the settings correctly inputed but am having problems.
On both Apps. when "adding new device" (the video doorbell) I can use the displayed "QR" code to get the doorbell to connect itself to my home EE Network, but boths Apps then fail to recognise the doorbell as a new device and add the doorbell to its' list of devices. Tried countless times with no success.
I even tried downloading both Apps to my wife's Samsung Galaxy A10 phone, with the same failures.
Has anyone else had similar problems, and how do I get my Oppo phone to recognise the Doorbell as a new device? Thanks! David (UK).

David, is it this app?
https://play.google.com/store/apps/details?id=cn.ubia.ubox
Looking at the many one star reviews, seems there's many users having the similar problems with it, with things like "Garbage, you can't connect devices..."

Suggest you return the video doorbell as unsatisfactory for a refund. And quite frankly cheapo no-name smart doorbells, and other cheapo IoT devices should be avoided as they might be unreliable, and may even be a security risk.