If you have a small Device you would want to use the Modern UI because it support touch inputs better.
Here is how you switch between the modern and desktop Version:

Open IE, click the Cog, Internet Options, Programs then uncheck the first checkbox below “Åpne Internet Explorer-fliser på skrivebordet” which translates into open Internet Explorer tiles on desktop.

Then hit the Windows Key and click the IE metro icon.

program settings