No wireless LAN access point or complicated ID or password entry is required, and once pictures have been downloaded to the smartphone, it is simple to upload them to social networking sites.
So convinced were the organisers of Mobile World Congress that they encouraged visitors to get an NFC pass for speedier entry to an event where security involves showing photo ID.
Dorner's ID and some of his personal belongings were found Thursday at the San Ysidro Point of Entry at the U.S.-Mexico border, according to the affidavit.