Almost all Android handsets are vulnerable to a flaw that could allow hackers to seize control of a device to make calls, send texts, or build a mobile botnet. The vulnerability has existed since at least Android 1.6, which means that it potentially affects any Android device released during the last four years. Samsung’s flagship Galaxy S4 has already been patched, so it is likely that manufacturers have quietly sprung into action. Bluebox Security.i.e.e almost 900 million Android devices globally.
Source: https://thehackernews.com/2013/07/android-vulnerability-allows-hackers-to.html