[4] AMR was adopted as the standard speech codec by 3GPP in October 1999 and is now widely used in GSM[5] and UMTS.
This improves the quality and robustness of the network connection while sacrificing some voice clarity.
The new intelligent system allows the network operator to prioritize capacity or quality per base station.
[9][10] The initial fee for professional content creation tools and "real-time channel" products is US$6,500.[when?]
[7][8] In the category of personal computer products, e.g., media players, the AMR decoder is licensed for free.