Facebook appears to be testing yet another mobile ad unit, this one combining the large “like page” button the social network introduced in mid-July with check-ins and prompting users to like the pages of the locations they check into.

Sister blog Inside Facebook reported on the new module, adding that it has heard rumblings of the social network working on some sort of real-time location-based advertising.

Facebook has been busy attempting to address its mobile advertising shortfall, also debuting a “pages you may like” box last week, which contains two mobile sponsored stories.

Readers: Have you been prompted to like a Facebook page after checking in at that location?

Screen grab courtesy of Inside Facebook.