Internet stalwart RealNetworks launched its LISTEN mobile app back in November, noting at the time that it was looking to “reinvent the ringback tone experience for smartphone users”. In a nutshell, LISTEN makes the songs and messages that play when someone calls you more flexible. For launch, the app was only available to Orange and T-Mobile subscribers in the UK – but from today, it’s being rolled out in the US too, kicking off with T-Mobile. You can select tunes from a catalog of music from Warner Music Group, Universal Music Group, and a slew of indie labels, assigning specific...

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