The second operating system hiding in every mobile phone
Though about GSM, if you want to learn more:<p>* <a href="http://osmocom.org" rel="nofollow">http://osmocom.org</a><p>* <a href="http://www.youtube.com/watch?v=xOp_wtsHAe8" rel="nofollow">http://www.youtube.com/watch?v=xOp_wtsHAe8</a><p>* <a href="http://www.youtube.com/watch?v=_0LCgxe24Po" rel="nofollow">http://www.youtube.com/watch?v=_0LCgxe24Po</a><p>* <a href="http://www.youtube.com/watch?v=9cBJV3yTaQo" rel="nofollow">http://www.youtube.com/watch?v=9cBJV3yTaQo</a><p>* <a href="http://www.youtube.com/watch?v=9cBJV3yTaQo" rel="nofollow">http://www.youtube.com/watch?v=9cBJV3yTaQo</a><p>Your phone has GSM, even if you're only on 3G or 4G networks though (unless it's a pure CDMA phone) - and the concepts are anyway quite similar in 3G/4G networks an phones.