I think they are legally forbidden from doing voice by the FCC, on the ultra low band spectrum they're using. (see http://www.fcc.gov/encyclopedia/multi-use-rad

I think they are legally forbidden from doing voice by the FCC, on the ultra low band spectrum they're using. (see http://www.fcc.gov/encyclopedia/multi-use-radio-service-murs-0 http://www.fcc.gov/encyclopedia/multi-use-radio-service-murs... search for "you can not make telephone calls") If you want walkie-talkies, there's another entire band dedicated to unlicensed voice calls - http://www.fcc.gov/encyclopedia/family-radio-service-frs http://www.fcc.gov/encyclopedia/family-radio-service-frs You could ask them to make a dual mode device. MURS for text/sms (and greater distance), and FRS for voice and picture messages (with less distance).