there are relatively few known viruses which can affect your Android phone. One of the best known outbreaks was a trojan-SMS virus known as Fakeplayer. This virus was capable of sending SMS messages from an infected phone to premium rate numbers without the user having any clue what was happening until their next bill arrived. Fakeplayer is thought to have infected hundreds of thousands of devices before it was identified and could be stopped.
Other well reported viruses include Gingermaster, which was used to steal user information from the infected device (including user ID, SIM details and IMEI numbers). This information could potentially be used to clone your phone, resulting in large bills which were nothing to do with you. DroidFungFu was different, giving hackers back door access to a users device and allowing then to copy or remove files stored on the phone.
Read more about: Android Viruses and Malware