Rio Sings Toll-Free Calling Tune

The Rio MP3 playback device can play more than digital music. Hackers are circulating instructions for making it emulate the sound of quarters entering old pay phones.

Add free phone calls to the Rio Internet music player's list of undocumented features. Availability may vary.

Hackers are circulating instructions on turning the Diamond Multimedia MP3 player into a device for making free phone calls.

The trick, which has also been used by PalmPilot owners, marries an old technique to a digital-era device.


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