Looks like it is due to the one-chip design: http://arstechnica.com/apple/2012/09/still-no-simultaneous-voice-and-data-on-the-verizon-or-sprint-iphone-5/ http:/

Looks like it is due to the one-chip design: http://arstechnica.com/apple/2012/09/still-no-simultaneous-voice-and-data-on-the-verizon-or-sprint-iphone-5/ http://arstechnica.com/apple/2012/09/still-no-simultaneous-v...