On Wednesday, Research In Motion Ltd. plans to unveil a new BlackBerry phone. BlackBerry devices have been losing market share to rivals, such as Apple's iPhone. Here are details on the number of devices RIM and Apple shipped in recent quarters, with percentage change from the same period a year earlier.

RESEARCH IN MOTION:

- Quarter ending Dec. 1, 2012: 6.9 million BlackBerry smartphones (down 51 percent), 255,000 PlayBook tablets (up 70 percent)

- Quarter ending Sept. 1, 2012: 7.4 million BlackBerry smartphones (down 30 percent), 130,000 PlayBook tablets (down 35 percent)

- Quarter ending June 2, 2012: 7.8 million BlackBerry smartphones (down 41 percent), 260,000 PlayBook tablets (down 48 percent)

- Quarter ending March 3, 2012: 11.1 million BlackBerry smartphones (down 26 percent), 500,000 PlayBook tablets (not on sale previous year)

- Quarter ending Nov. 26, 2011: 14.1 million BlackBerry smartphones (down 1 percent), 150,000 PlayBook tablets (not on sale previous year)

APPLE:

- Quarter ending Dec. 29, 2012: 47.8 million iPhones (up 29 percent), 22.9 million iPads (up 49 percent)

- Quarter ending Sept. 29, 2012: 26.9 million iPhones (up 58 percent), 14.0 million iPads (up 26 percent)

- Quarter ending June 30, 2012: 26.0 million iPhones (up 28 percent), 17.0 million iPads (up 84 percent)

- Quarter ending March 31, 2012: 35.1 million iPhones (up 88 percent), 11.8 million iPads (increase of about 2.5 times)

- Quarter ending Dec. 31, 2011: 37 million iPhones (more than double), 15.4 million iPads (more than double)