Wi-Fi turn off automatically??

[Idzaudin Idz]

My Wi-Fi turned off automatically when I don't use my phone.... Any solution to prevent it from turning off? Windows phone 8.1

 

[azcruz]

Go to Settings, WI-Fi, manage.

 

[Idzaudin Idz]

Go to Settings, WI-Fi, manage.

There is no "keep Wi-Fi on" option