title: What's the meaning of metered wifi networks?
body: <p>Ok , I know that means this wifi network is a cost wifi. and it will make apps won't use any data when in background . but it's tip is : Apps may warn before using these networks for large downloads.</p>
  
  <p>Whatever I download, it seems never show that warning .</p>
  
  <p>could anyone give me a screen shot about this warning?<a href="https://i.stack.imgur.com/eFict.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eFict.jpg" alt="enter image description here"></a></p>