One significant change in the first quarter of 2011 was Androidís becoming the third-most targeted platform for mobile malware. This quarter the count of new Android-specific malware moved to number one, with J2ME (Java Micro Edition), coming in second while suffering only a third as many malware.
This increase in threats to such a popular platform should make us evaluate our behavior on mobile devices and the security industryís preparedness to combat this growth.
We also saw an increase in for-profit mobile malware, including simple SMS-sending Trojans and complex Trojans that use exploits to compromise smartphones. - McAfee Threat Report