Sep 16, 2010 10:22 GMT  ·  By

A self-proclaimed leader in measuring the digital world, comScore makes an interesting observation in its latest report, noting that Apple’s iOS is down 1.3% in terms of market-share, when the iPhone 4 launch was actually expected to strengthen Apple’s presence in the market.

Reporting key trends in the U.S. mobile phone industry during the three month average period ending July 2010 compared to the preceding three-month average, comScore released data from the comScore MobiLens service, ranking the leading mobile original equipment manufacturers (OEMs) and smartphone operating system (OS) platforms in the U.S.

The analysis was made based on the OEMs’ share of current mobile subscribers aged 13 and older.

comScore was careful to review only the most popular activities and content accessed via the subscriber’s primary mobile phone, the metrics company said.

“The July report found Samsung to be the top handset manufacturer overall with 23.1 percent market share, while RIM led among smartphone platforms with 39.9 percent market share,” comScore noted.

Delving deeper into the market-share of major vendors, “For the 3 month average period ending in July, 234 million Americans ages 13 and older used mobile devices,” said comScore.

Samsung was declared the winner with 23.1 percent of U.S. mobile subscribers - up one percentage point from the preceding three month period, according to the report.

“LG ranked second with 21.2 percent share, followed by Motorola (19.8 percent share), RIM (9.0 percent share, up 0.6 percentage points) and Nokia (7.8 percent share),” comScore revealed on.

In the smartphone world, “RIM was the leading mobile smartphone platform in the U.S. with 39.3 percent share of U.S. smartphone subscribers, followed by Apple with 23.8 percent share.”

“Google saw significant growth during the period, rising 5.0 percentage points to capture 17.0 percent of smartphone subscribers,” noted comScore.

It’s not surprising to see Android gain more presence, but it is interesting (to say the least) that Google’s OS found more acceptance just when Apple had launched the iPhone 4.

Even more disturbing is that Apple’s share dwindled just as its new smartphone was taking off, fueling beliefs that the “Antennagate” issue may have played an important role in this.

The delay in shipping White iPhone 4 units may also be a factor, though this is pure speculation on Softpedia’s behalf.

RIM also lost 1.8% and Microsoft lost another 2.2%, the report also revealed.

comScore is a reliable source of digital marketing intelligence, making its recent findings indicative to the current trends in the smartphone marketplace.