Straight Talk has a CDMA option available, with the byop activation but for some reason I couldn't get it to work. I got my mom a free Verizon Samsung Galaxy and converted it to the GSM network and it works on the att network with her SIM card. But Verizon actually picks up better in her area. Since the Galaxy is CDMA and GSM capable, how do I convert it to the CDMA option?? Any helpful advice!