The Fire Phone was rumored to be under development for several years prior to its release. Amazon ceased production of the Fire Phone in August 2015 and discontinued sales soon after. Amazon does not release sales figures for any of its devices, but based in part on its quickly declining prices and an announced $170 million write-down, analysts have judged it having not been commercially successful. Critics praised the Dynamic Perspective, Firefly and, to a lesser extent, the packaged headphones, but derided the build, design, Fire OS version of Android, specifications, and exclusivity to AT&T. Other notable Amazon services on the phone included X-Ray, used for identifying and finding information about media Mayday, the 24-hour customer service tool and Firefly, a tool which automatically recognized text, sounds, and objects, then offering a way to buy recognized items through Amazon's online store. The phone was notable for its hallmark feature "Dynamic Perspective": using four front-facing cameras and the gyroscope to track the user's movements, the OS adjusts the UI so it gives the impression of depth and 3D. In the United States, it launched as an AT&T exclusive on July 25. It was available for pre-order on the day it was announced. It was announced on June 18, 2014, and marked Amazon's first foray into the smartphone market, following the success of the Kindle Fire. The Fire Phone is a 3D-enabled smartphone developed by and manufactured by Foxconn.