Mobile music is cum music is downloaded or streamed to mobile phones and played by mobile phones. Although many phones play music as ringtones, true "music phones" generally allow users to stream music or download music files over the internet via a WiFi connection or 3G cell phone connection. Music phones are also able to import audio files from their PCs. The case of mobile music being stored within the memory of the mobile phone is the case similar to traditional business models in the music industry. It supports two variants: the user can either purchase the music for outright ownership or access entire libraries of music via a subscription model. In this case the music files are available as long as the subscription is active. Truetones While ringtones do not include artists voices, truetones, chaku-uta and chaku-uta full are recordings of artists' interpretation of music. Distributing them usually requires the agreement of record labels and other owners of artists' rights. History The integration of music in a cellphone was not easy. On one hand, technology for portable music had been developed since the 1980s with Sony driving the area with its portable walkman. On the other, cellphone technology had focused on the area of imaging, leveraging the user interest in taking pictures and the operator's need to drive data revenues through the use of its network. The success of ringtones in driving data revenues had placed operators on guard for interactive applications that could drive revenues. Nevertheless, slow data speeds in the GSM and CDMA areas which had 1 and 2G technology, prevented the economic download of music data through networks in comparison with media sites to a computer. So operators, which tended to subsidize phones with data capabilities focused more on ringtone, SMS, and picture phones than on music ready phones, and this prevented many manufacturers to develop those phones because their primary customer is the operator and not the user. Work on compression algorithms for music was extensive with AMR trying to push the envelope, but the revolution of Napster proliferated the world with the MP3 format and manufacturers began to take notice. Another issue was the development of DRM capabilities which helped prevent music piracy and gave mobile music more of a legal status. At that time, Apple was revolutionizing the world with the introduction of the new iPods and its iTunes Store. The first report