While Apple's iPhone sales are softly declining as customers wait for an expected September release of new models, a new study by Kantar Worldpanel shows that the marketshare for the company's mobile platform is still growing in a number of key markets, most importantly the United States. Based in part on the strength of the older iPhones with new smartphone buyers, Apple is also seeing growth in marketshare in the UK and France -- taking share away from both Android and BlackBerry, even as Windows Phone begins to gain a foothold.