After upgrading to 6.x the mobile theme settings no longer seem to be working.

When I enable Mobile Phone Theme and select Unified as my theme, I get the main theme on my phone, which is set to the Default theme.

If I switch the main theme to Unified, it displays correctly on my phone, but we want the Default theme for the desktop.

Any ideas on why I’m not getting the Mobile Phone theme on my mobile phone devices when it is enabled?

Thanks.