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Wednesday
May042011

Apple Releases iOS Update

Apple has released iOS version 4.3.3 for the GSM iPhone 4, GSM iPhone 3GS, iPod Touch (3rd & 4th generation), iPad and iPad 2.  In addition to bug fixes, the latest iOS version also changes the way the crowd-sourced location cache is handled: 

  • Reduces the size of the cache  
  • No longer backs the cache up to iTunes
  • Deletes the cache entirely when Location Services is turned off

A separate iOS version 4.2.8 is also available for the CDMA iPhone 4.

Both updates are available through iTunes when you connect your iOS device and click Check for Update.

I have installed the update without issue.  Total time to install and sync my iPhone 4 was approximately 13 minutes.

 

Wednesday
Apr272011

Apple Q&A On Location Data

Apple Inc. has published their response to the growing controversy over the recording of iPhone user location.

Why is Apple tracking the location of my iPhone? 
Apple is not tracking the location of your iPhone. Apple has never done so and has no plans to ever do so.

Apple goes on to explain why there is a need for a location database.

Why is my iPhone logging my location? 
The iPhone is not logging your location. Rather, it’s maintaining a database of Wi-Fi hotspots and cell towers around your current location, some of which may be located more than one hundred miles away from your iPhone, to help your iPhone rapidly and accurately calculate its location when requested. Calculating a phone’s location using just GPS satellite data can take up to several minutes. iPhone can reduce this time to just a few seconds by using Wi-Fi hotspot and cell tower data to quickly find GPS satellites, and even triangulate its location using just Wi-Fi hotspot and cell tower data when GPS is not available (such as indoors or in basements). These calculations are performed live on the iPhone using a crowd-sourced database of Wi-Fi hotspot and cell tower data that is generated by tens of millions of iPhones sending the geo-tagged locations of nearby Wi-Fi hotspots and cell towers in an anonymous and encrypted form to Apple.

The document also explains that a software bug is responsible for the location database cache file being updated when a user has turned off Location Services in their iPhone settings.  Apple states they will be releasing a software update in the next few weeks that will address this, plus a couple of other issues.

  • reduces the size of the crowd-sourced Wi-Fi hotspot and cell tower database cached on the iPhone,
  • ceases backing up this cache, and
  • deletes this cache entirely when Location Services is turned off. 

Apple ends the document stating that, in the next major iOS update, the cache will also be encrypted on the iPhone.