Toggling the mobile version

I quite often browse the forum on my phone. Initially my phone brought up the mobile version of the website automatically. I found a button that allowed me to toggle to the regular version, and like an idiot I pressed it. Now I can only view the regular version on my phone.

Is there a way to toggle back to the mobile version? Or is there a link that will take me to the mobile version?

When the full desktop version is displayed on a mobile device you scroll to the very bottom of any Forum page and on the left side is a pull-down menu. Click that and select 'Default mobile style' and it will return to that version.