Despite the launch of Samsung’s iPhone-competing Galaxy S4 in April 2013, Apple’s share of the U.S. smartphone market is remaining strong, with Detwiler Fenton’s Mark Gerber recently pronouncing iPhone sales in the United States to be “resilient,” and to have held up better than some originally expected.

Gerber noted, via Barron’s:

Our latest checks continue to indicate North American iPhone sales remain resilient, despite the high profile device launches from Samsung [Electronics (005930KS)] and HTC (2498TW). Based on our checks, we believe QTD share at Verizon Wireless [o fVerizon Communications (VZ)] is only off a couple percentage points sequentially and that iPhone5 continues to garner a larger percentage of iPhone share. We believe that share at AT&T (T) and Sprint (S) has dropped slightly more than at VZ due to the Galaxy S4 share gains and that T-Mobile (TMUS) will sell approximately 1MM units in the June Q.

Clearly, Apple’s brand is stronger than certain scaremongers previously gave it credit for, and at this rate iPhone sales should remain resilient over the course of the forthcoming months.

Later this year, Apple is expected to launch the iPhone 5S, which will replace the iPhone 5 as the company’s flagship smartphone. Gerber suggests that until then, Apple will be able to hold on to most of its U.S. market share, before an anticipated boom once the seventh-generation handset hits Apple Stores.

We’ll keep you posted.

In the meantime, see: AppleCare Training To Move Online, Recertification Exams To Be DroppedChicago Sun-Times Fires Photography Staff, Offers Reporters iPhone Camera Classes, and Teardown Of Apple’s New iPod touch Reveals Near-Identical Internals.