There's a very good comparable from present day. It's SMS. http://www.ctia.org/consumer_info/service/index.cfm/AID/10323 http://www.ctia.org/consumer_info/ser

There's a very good comparable from present day. It's SMS. http://www.ctia.org/consumer_info/service/index.cfm/AID/10323 http://www.ctia.org/consumer_info/service/index.cfm/AID/1032... SMS volume in the US spiked after interoperability between carriers became a reality from 2003 - 2005. Prior to 2003, Europeans and Asians turned their noses down at their American counterparts because "Americans just didn't text." From here: http://www.usatoday.com/tech/news/2003-06-02-text-me-main_x.htm http://www.usatoday.com/tech/news/2003-06-02-text-me-main_x.... At the time, only "12% of cell phone users in the USA send or receive text messages." And from recent times: http://articles.latimes.com/2009/dec/16/nation/la-na-census-texting16-2009dec16 http://articles.latimes.com/2009/dec/16/nation/la-na-census-...