Thank you for your reply. My apologies for the rushed post.
My expectation was that, once I moved out of WiFi range from my saved connection at home then there would be an automatic connection via the cell network and then on my return, the opposite. If tis is not correct, then what is the function of "Auto-connect: Allow connection to this network when in range"?
You ask "do you have WiFi on your phone set to turn off automatically"? Where is this setting, please?