I've read here that you can't do voice and data at the same time. Maybe you can if on 4G. No mention of wifi. Looking for clarity before going to store. Thanks!
The Droid Turbo can't do simultaneous voice/data unless on wi-fi; an update is pending ... see:
http://www.droid-life.com/2014/10/30/fyi-droid-turbo-cant-currently-do-simultaneous-voice-and-data/