You would be so kind mb-theme to send us the code and where to insert it
so everyone can make the change whoever wants

I hope that MB themes will Help us

I am i think The Best customer of osclassppont. I buy 70% of plugins.

Still no answer. Can someone make this to work on mobile as well ?

I think it is unproductive for Mb-Theme to give us the code

Code can be found i.e. in sigma theme (for dropdowns Country > Region > City).