can i enable jwplayer video quality option selector on mobile phones

I'm using jwplayer to play videos with quality selector option(multi resolution) on my video site and it's working fine on PC browser but in mobile phone it's hide and users can't select quality it's self.

<script>
var playerInstance = jwplayer("myElement");
playerInstance.setup({
      image: "/uploads/myPoster.jpg",
      sources: [{
        file: "/uploads/myVideo.m3u8"
      }]
    });
</script>

any one know how to enable quality selector option on mobile browser.