switch to wifi

[gdiddy]

Hello.
Many times I use my mobile data outside of my house. But, when I return to my house, I forget to turn on my WIFI and my mobile data runs unnecessarily.
Can you please tell me......
How I can have my phone automatically turn off mobile data when WIFI is available?
Thank you.

 

[Kage Korosu]

Is there any reason you don't keep Wi-Fi on while outside the house? Even without a Wi-Fi signal, it doesn't take up a ton of power.