“The ease and ability of Android licensees to modify the software they install on their smartphones has opened vast security holes that enable rogue apps to record calls, monitor users’ locations and access sensitive data without permission, researchers say, noting that while Google and Motorola acknowledge the issues, HTC and Samsung have ignored their findings.”

http://www.appleinsider.com/articles/11/12/05/serious_security_flaws_discovered_in_android_phones_samsung_and_htc_ignore_issue.html