29C3 presentation on making a calypso phone act as a GSM base station

[Timo Juhani Lindfors]

Hi,

in case somebody missed it I highly recommend watching

http://ftp.ccc.de/congress/29C3/mp4-h264-HQ/29c3-5226-en-further_hacks_calypso_h264.mp4

that shows how a cheap motorola phone with Calypso can be made to appear
as a GSM base station without any hardware modifications. Very
interesting proof of concept :)

-Timo