Nielsen: Android share of U.S. smartphone market hits 43% by Philip Elmer-DeWitt @FortuneMagazine September 26, 2011, 2:35 PM EST E-mail Tweet Facebook Google Plus Linkedin Share icons Of those purchased in last 3 months, 56% were Androids. iPhone holds steady at 28%. Click to enlarge. The results of a Nielsen survey conducted in August and released Monday reinforced several ongoing trends: The smartphone pie is getting bigger. While 43% of all mobile subscribers in the U.S. had a smartphone as of August, according to Nielsen, 58% of those who bought a new mobile phone in the last 3 months chose a smartphone over a feature phone. Android’s slice continues to grow. The share of smartphones running Google’s GOOG Android OS hit 43% in August, but of those who bought smartphones in the past 3 months, 56% bought Androids. The iPhone’s share is holding steady. Apple’s AAPL iOS remains in second place, with a 28% share of all subscribers and of recent purchasers. The also-rans are running out of time. Research in Motion’s RIMM BlackBerry and “other” continue to lose share. In its interpretation of the results, Nielsen offers two contradictory observations: “The preferences of … so-called ‘recent acquirers’ are important as they are often a leading indicator of where the market is going.” “[Apple’s] figures could change quickly in the months to come. Every time Apple launches a new iPhone or makes it available on a new wireless carrier, there is an increase in their sales.” Below: A Nielsen chart showing the relationship between all subscribers and recent acquirers. You can read Nielsen’s press release here.