Thank you for sharing your experience with us @AHR! We value our neighors’ feedback and will certainly share this with the team for further investigation. As you’ve factored out network and device variables, as well as tried on another mobile device, this really narrows down to the best area of focus.
Please ensure the VPN is also disabled on your Samsung and uninstall any android apps that can conflict with the Ring app. You’ve done quite a bit to optimize mobile device performance and connection. Feel free to include any error messages you might receive or further observations related to this concern. In addition to the above steps, try also resetting your mobile device network connection manually, and ensure features like data saver or not enabled.