With Apple’s latest mobile operating system, iOS 6, the company has reportedly resumed tracking users so that advertisers can target them. “Previously, Apple had all but disabled
tracking of iPhone users by advertisers when it stopped app developers from utilizing Apple mobile device data via UDID, the unique, permanent, non-deletable serial number that previously identified
every Apple device,” Business Insider reports. “In iOS 6, however, tracking is most definitely back on, and it's more effective than ever, multiple mobile advertising executives familiar
with IFA tell us.”