PHLEARN explains the concept:
We’ve wanted to do a pinup shoot for a long time, but we also wanted to make it stand out from all of the other pinup photos out there by adding a concept to it. While looking through images of classic pinups, we realized that the technology from that era has all been rolled into one device, the smartphone. This sparked the idea for a concept showing the contrast between then and now with some beautiful pinups.
This would have been a much more interesting and editorially-relevant shoot if the models were using other high-tech devices besides just the smartphone.