My take on it is to not bother with the older GSM and CDMA but to instead focus on LTE. Although GSM will probably be around globally for a while, it is on the

My take on it is to not bother with the older GSM and CDMA but to instead focus on LTE. Although GSM will probably be around globally for a while, it is on the wane as is CDMA. There is a lot of interesting open work going on for LTE including LTE on unlicensed bands. http://sourceforge.net/projects/ltemodem.motorola/ http://sourceforge.net/projects/ltemodem.motorola/ http://www.eurecom.fr/en/content/virtulization-lte-softmodem http://www.eurecom.fr/en/content/virtulization-lte-softmodem http://sourceforge.net/projects/openlte/ http://sourceforge.net/projects/openlte/