For the first time, a majority of U.S. mobile subscribers of all age groups own smartphones. In fact, 51% of mobile owners over the age of 55 now own smartphones, driving the growth in smartphone penetration to seven out of 10 Americans overall. Smartphone penetration continues to grow every day, with 85% of recent acquirers picking smartphones when purchasing new handsets. The majority of smartphones in the U.S. run Android OS (52%), and more than half of these were made by Samsung (29%). However, Apple remains the largest smartphone manufacturer, whose handsets are used by 42% of smartphone users in the U.S. Meanwhile, Nokia's market share doubled over the last year, overtaking Blackberry as more recent smartphone acquirers have chosen Windows Phone handsets, which now make up 3% of smartphones in the U.S.