BROOKFIELD, Wis.--(BUSINESS WIRE)--According to research commissioned by Fiserv, Inc. (NASDAQ:FISV), a leading global provider of financial services technology solutions, there has been substantial growth in mobile bill pay offerings and usage over the past year. Almost one in five visits to a biller’s website come from a mobile device - a 55 percent increase over 2013. Of those visits, bill payment is the number one consumer activity. Despite the growing use of the mobile channel, only 16 perc