If you’re having problems contacting family and friends in Puerto Rico right now, try using Skype or AT&T.
Domestic and international calls made via Skype to landlines and mobiles in the affected Puerto Rico regions are free of charge until further notice.
AT&T set up an online messaging system that might also help you contact people in Puerto Rico …
To apply, enter the cell phone number of the customer you’re trying to contact on the AT&T website, then enter your number. When that person is able to connect to a wireless network, AT&t will let them know someone is trying to contact them from your phone number, and will notify you when more service is up and running.