Consumer demand for Research In Motion's (NASDAQ:RIMM) BlackBerry continues to erode: The mobile operating system now powers less than 10 percent of all smartphones across the U.S., according to new data from research firm comScore.

BlackBerry represents 9.5 percent of the U.S. market as of July 2012, sliding another 2.1 percentage points since April and down from a high of 43 percent in 2009. There is little, if any relief, in sight: RIM will not launch devices running its revamped BlackBerry 10 OS until the first quarter of 2013.

Google's (NASDAQ:GOOG) Android continues to dominate the U.S. market and powers 52.2 percent of all smartphones nationwide, increasing from 50.8 percent three months earlier. Apple's (NASDAQ:AAPL) iOS continues to narrow the gap, jumping from 31.4 percent market share in April to 33.4 percent in July. Microsoft's (NASDAQ:MSFT) Windows Phone trails far behind at 3.6 percent, down from 4 percent in April, and Symbian brings up the rear at 0.8 percent, compared to 1.3 percent three months earlier.