Apple's lead over Samsung in the U.S. widened in AprilMay 4, 2013: 10:56 AM ET
But Samsung isn't falling behind the iPhone as fast as it was in February or March.
FORTUNE -- Google's (GOOG) Android, at 52%, took the largest share of U.S. smartphone sales in the three month period (Jan. - Mar.) covered by comScore's report Friday. But it managed to lose 1.4 percentage points sequentially, while Apple (AAPL), at 39%, gained 2.7.
In the Apple vs. Samsung competition, Apple widened its U.S. lead, which now stands at 39% to 21.7%. But as Brian Loftus' chart above shows, Apple is not widening that lead quite as fast as it had been in recent months.
Outside, the U.S., it's a different story. See The mobile world according to Kantar.
Below the fold: comScore's spreadsheets.