Around April 20, 2011, a hidden unencrypted file on the iPhone and other iOS devices was widely discussed in the media. It was alleged that the file, labeled "consolidated.db", constantly stores the iPhone user's movement by approximating geographic locations calculated by triangulating nearby cell phone towers, a technology proven to be inaccurate at times. The file was released with the June 2010 update of Apple iOS4 and may contain almost a year's worth of data. Previous versions of iOS stored similar information in a file called "h-cells.plist".