Dallas (WBAP/KLIF) Dallas based AT&T has set up a website to let anyone stateside (regardless of carrier) register the cell phone number of a family member or friend who is an AT&T wireless customer in Puerto Rico. When the Puerto Rico based customer’s cell phone connects to the AT&T network, the customer will be notified their family or friends in the U.S were trying to reach them. The company says it has a plan in place to restore and maintain cell phone service to the island.