One security firm on Thursday claimed that 2013 will be the year of mobile malware for Android users, however no specific numbers had been given. The team at Lookout Mobile Security has painted a similar picture for Google’s (GOOG) operating system. The firm notes that more than 1.2 billion mobile devices are expected to be purchased in 2013 and in the following year users are forecasted to download over 70 billion mobile apps. Due to Android’s popularity, it is estimated that 18 million devices running the operating system may encounter some form of mobile malware. The likelihood that users will encounter malware or spyware, however, is heavily dependent on geographical location and behavior. Research from the security firm reveals that users in the U.S. have a 0.40% chance of seeing malware, compared those in Russia with a 34.7% chance.