Hi Adam,
I just had a quick look at the Jreviews demo admin back end. It seems that Jreviews honours the Joomla method of placing modules in positions in a template.
So to make MJ work with Jreviews, assuming you have both installed on a site, I'll use an example from the
demo.reviewsforjoomla.com/ website
Top Rated Listings is shown in position inset 1
you can see the positions if you look at
demo.reviewsforjoomla.com/index.php?tp=1
To make Top Rated listings show on all mobiles you would go to
extensions > module manager
and make a copy of the module top rated listings (click in the box on the left and click on copy top right)
then in the copy enable it and change the position to mj_all_middle
save
this will then show on a mobile browser.
Let me know what happens.