Well, think about that one for a second. #1, android OS is derived from what OS? Linux. Linux for the most part is free, open source software. And people usually think that since Linux is free, why would anyone want to hack it? #2, a lot of people are not fully aware of how a computer can be infected by a virus. And a smartphone is essentially a hand held computer that can also make and receive calls. Basically, it all boils down to ignorance.