However, there is a class of mobile devices that complies with the aforementioned characteristics. Smartphone's are high-end mobile devices that offer more advanced computing power and connectivity than a mobile phone. Security is one of the main concerns for Smartphone users today. As the power and features of Smartphone's increase, so has their vulnerability for attacks by viruses etc. An Android OS could be attacked by hackers: Because it's open platform, users will access the internet intensively and everyone can develop applications for Android.