There is a way to get a Desktop version on mobile devices, by modifying the header.php file in the theme(which I don’t recommend), since, after that, your website will not be responsive, so your content will be difficult to see.
I see no reason why anyone should do this …
If you still want to see what your website would look like in this case, follow these steps:
Edit the Theme Header file:
1. Open Appearance->Editor
2. On the right side, find the “header.php” file.
3. In the main area delete the content in line 28. (