The FCC has granted Alphabet, Google's parent company, permission to use their Project Loon balloons to provide cellular service to Puerto Rico. Two weeks after Hurricane Maria there is still as much as 83 percent of the population who don't have any cellular service.
https://www.notebookcheck.net/Alphabet-s-Project-Loon-balloons-will-restore-cell-service-to-large-parts-of-Puerto-Rico.257652.0.html