Public wifi keeps usurping my own

Aug 7, 2018
I have a Galaxy S9. The phone keeps switching networks when I use it at home. The reason is that the publc "Cable-Wifi" has a very weak signal. Every time it comes into range it bumps my own wifi. I have switched off auto-reconnect and hot forget network hundreds of times but it keeps happening. The only way I would be able to do it is to stop the phone from scanning networks or block "cable-wifi" indefinitely. Any ideas on how I would do either?
Try this...

1. Go into "Settings" and then "WiFi".
3. In here tap the 3 dots and then tap "Advanced".
3. Now you can uncheck "Scanning Always Available".

This should stop it.