When the fire broke out, the crew tried to contain the smoke using the battery containment bag. But the amount of smoke reportedly forced the deployment of evacuation slides. A spokesperson for the Port of Seattle confirmed the phone that caught on fire on the flight was the Samsung Galaxy A21.

source https://gadgets.ndtv.com/mobiles/news/samsung-a21-smartphone-fire-incident-flight-forced-evacuation-seattle-tacoma-airport-galaxy-2518142#rss-gadgets-all