On vacation and using my iPhone as a hotspot for internet. In the wifi window my phone is connected but other available connections keeps showing up and  always has the box "connect automatically" checked, I can un-check it but they always comes back checked. 

I have set everything to not share etc but am worried about these unwanted hotspots.

I would like to set this Dell Inspiron 15-3537 to only recognize my home modem and my phone for wifi. I do not wish to use any other wifi.