Really, is this the FCCs responsibility?
Tracking cell tower repair rates seems like the responsibility of the Free Market, not some government bureaucracy. Really, this seems like a perfect fit for the FTC to handle. If the Puerto Ricans don't like the repair rates, they're free to use other companies.
Of course, they're going to have to pay some high tariffs, just like any other foreign state would. Lousy ocean-mexicans!