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Spotify launched in the United States in July 2011, and offered a six-month, ad-supported trial period, during which new users could listen to an unlimited amount of music for free. In January 2012, the free trial periods began to expire, limiting users to ten hours of streaming each month and five plays per song. [ 19 ]
In some cases, GPS receivers are designed to use up to 400 MHz of spectrum in either direction of the L1 frequency of 1575.42 MHz, because mobile satellite services in those regions are broadcasting from space to ground, and at power levels commensurate with mobile satellite services. [207]