Changing width of phone device screen?

Without a link to the site it is impossible to offer any assistance. We would need to inspect the code to see which element is causing the overflow.

Sorry, commercial themes are not supported here. You should ask for support from the developer where you purchased this theme.

Then your content is too wide for the screen size.

The icon bar at the top is too wide.

This content here is pushing past its container http://prntscr.com/lcr9oc