Google's OS captured 61 percent of ad impressions on the mobile ad network in July, a healthy gain from 54 percent the last month. On the flip side, Apple's iOS lost some share last 30 days, dropping to 21 percent of all impressions from 26 percent in 06. Android has held onto its leading spot for the past eight months since overtaking iOS earlier this January.
That left Research in Motion's BlackBerry with 14 percent of just about all impressions, followed by Nokia's Symbian and Microsoft's Windows Mobile, each with two percent.
Looking strictly at the device makers, Apple retained its solid lead having a 26 percent share of all ad impressions (iPhone, iPad, and iPod Contact combined). As usual, the iPhone itself was No. 1 among the top 20 cell phones tracked by Millennial Media with a 13. 6 percent share.
For the sixth month inside a row, Samsung took second place, grabbing more than 19 percent of just about all impressions, up from 17 percent in June. The company's Nexus S phone trailed the iPhone on top 20 list with a 5. 7 percent share.
Among other device manufacturers, RIM was in third place with 11. 5 percent of impressions, while its BlackBerry Curve also took the third-highest spot one of the top 20 phones with a 5 percent share.
Motorola, which last 7 days received a $12. 5 billion buyout offer from Google, was the 5th leading device maker, taking 10 percent of all ad impressions. The company accounted for 3 from the top 11 mobile phones, namely the Droid, the Droid X, and the actual Droid 2.
Among all devices tracked by Millennial Media in July, 68 % were smartphones, 16 percent were feature phones, and 16 percent were linked devices, such as the iPod Touch, the iPad and other tablets, as well as portable gaming consoles.