SMS messages sent to friends in the phone book of smartphone users.
Finally, the virus left a message to remind users to check their phone bills, and recommended that they remember to buy a legal Walk and Text version on the Android Market.
Warning of virus authors with users. Photo: Symantec.
Representatives from security firm Symantec said Android.Walkinwat is appearing on many file-sharing websites in the US and Asia. This is the first case where the virus was born on the phone to judge users' piracy.