Apple Has Quietly Started Tracking iPhone Users Again, And It's 
Tricky To Opt Out

Jim Edwards
Oct. 11, 2012

Apple's launch of the iPhone 5 in September came with a bunch of new 
commercials to promote the device.

But Apple didn't shout quite so loud about an enhancement to its new 
mobile operating system, iOS 6, which also occurred in September: The 
company has started tracking users so that advertisers can target 
them again, through a new tracking technology called IFA or IDFA.

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.

For the last few months, iPhone users have enjoyed an unusual 
environment in which advertisers have been largely unable to track 
and target them in any meaningful way.

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. (Note that Apple doesn't mention IFA in its iOS 6 
launch page).

...

http://www.businessinsider.com/ifa-apples-iphone-tracking-in-ios-6-2012-10

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