Researchers probed 20,400 Android devices and found 87.7 per cent contained at least one exploitable vulnerability due to a slow patch management. Vulnerabilities (11) could let malware hijacking traffic, bricking mobile devices, replacing apps, and stealing user credentials. O2 US is the best in pushing over-the-air security fixes, coming after T-mobile and Orange and Orange. The study also highlights that Nexus is the vendor that most of all constantly update its products.”]
Source: http://securityaffairs.co/wordpress/41128/hacking/android-vulnerable-patch-management.html