Wifi Turns off

thisshouldwork

    Perhaps someone can help me.

     

    I have an LG K7 two weeks old. I prepay for my minutes and I don't have data.

     

    I will connect the phone to the wifi in my home. 15 minutes later, the phone will disconnect from the wifi. The wifi is very. Very. stable in my home. I have an ipod touch, kindle, and laptop that never fall off the network.

     

    last night, I was making a wifi call. 15 minutes into the call, the wifi disconnected.

     

    I have gone to:

    advanced wifi - keep wi-fi on when screen is off and have selected yes. The wifi still turns off

     

    How, Someone please tell me how to keep the wifi on.

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