According to research firm comScore's latest U.S. smartphone user report, Apple saw quarterly subscriber gains in June as iOS slowly crept up on Android, which held stable with over half of the market.
On the heels of IDC's look at the worldwide smartphone market, comScore issued the latest findings from its MobiLens service for the second quarter of 2013.
The firm found Apple to lead the U.S. market with a 39.9 percent share at the end of June, a positive 0.9 point change from the first three months of the year. Samsung also boosted its piece of the pie by 2 percent, ending the second quarter with 23.7 percent of the market.
Apple and Samsung's gains were at the expense of the other top five manufacturers, with No. 3 HTC holding 8.5 percent of the market, fourth place Motorola with 7.2 percent, and LG at 6.6 percent. Each of the bottom three lost marketshare equating to 0.5 percent, 1.3 percent, and 0.2 percent, respectively.
In terms of operating system marketshare, Android dominated with 52 percent of the market, but exhibited no growth quarter-to-quarter. Apple's iOS came in second with a 39.9 percent share, again up 0.9 points from last quarter.
BlackBerry took 4.4 percent of the market, down 0.8 percent from the March quarter, while Microsoft's Windows Phone moved up slightly from 3.0 percent to 3.1 percent. Symbian continued to fall, losing 0.2 points quarter-to-quarter to finish with 0.3 percent of the market.
At the end of the June quarter, almost 142 million people in the U.S. owned a smartphone, a number up 4 percent since March. According to comScore, smartphones now account for 59 percent of the mobile market.