Help Wifi and 4g on at the same time

[Carolinagirl489]

I have a Samsung Galaxy Express i437 and I've had it for almost a year and a half and these past few weeks I have notice that both my wifi and 4g are on at the same time. And I've been wondering what could be causing this and how do I fix this?

 

[Rukbat]

What's causing it is that you turned them both on. To fix it, turn the one you don't need off.