While Samsung has recalled its Galaxy Note 7 smartphones on September 2 due to faulty batteries, the company has yet to formally recall them with the U.S. Consumer Product Safety Commission. That is, until today. CNNMoney reports: While Samsung hammered out its formal recall plan with U.S. regulators, the FAA told airline passengers to turn off the phones when flying due to the safety risk. This week, New York City's transit system followed suit. And the CPSC urged Note 7 owners last week to turn off their phones even though a replacement version had yet to be finalized. Following Thursday's formal recall, the FAA revised its warning. Note 7 owners must not only turn off the device on airplanes, it said, but also protect the power switch "to prevent the phone from being unintentionally activated." The U.S. CPSC tweeted today: "#Recall: 1M @SamsungMobileUS #GalaxyNote7 smartphones; serious burn/fire hazard; Act Now: https://t.co/6v1egZlrRm." The recall could not have happened at a worse time for Samsung, as Apple's iPhone 7 debuts tomorrow.