Mobile Mix For April: Android Ad Requests Grew 77% For The Month, 282% Since Jan.

In the second edition of its “Mobile Mix” mobile device index, Millennial Media reports some impressive gains for the Android platform as seen through its network, as well as other insightful device data.

Most notably, Millennial indicates Android ad requests grew 77% month over month, and an impressive 282% since January.  RIM remained the second largest OS on its network for the ninth consecutive month with a 3% increase for the month and a 17% share of total ad impressions.

Apple on the other hand showed an 8% decrease, but remained the number one OS on its network with 62% of total smartphone impressions and 35% of total U.S. impressions.

Also notable was HTC, who for the first time entered the top 5 device mix and represented the largest increase within the top 15 manufacturers in April with a 2.5% impression-share increase month over month.  HTC’s affinity for Android-based devices will likely help push the company to the top of the ranks very soon.