Wifi on phone is slow ONLY when im out of data?!

[Android Central Question]

I have Cox wifi and Verizon cell service. Any time I'm out of data my speed on my phone at home is PAINFULLY slow. I also seem to run out of data at home a lot when I'm connected to WiFi! Does this sound like a Cox problem? We just bought our home and there was no cable or wifi so we had all new lines run and routers placed. When I look at data use I'll see little bits here an there while we Are sleeping and phones and charging....I wasn't sure if it might be a setting on my Moto z2 play that needs to be adjusted so it will only stay on wifi??

 

[B. Diddy]

Welcome to Android Central! Running out of data from your Verizon service or your Cox home internet service? Do you have some kind of data cap on your home internet service?