According to Mikko Hypponen from software security company F-Secure, Windows Phone 8 is currently the most safe mobile operating system there is.
Although Apple’s iOS is also commonly known as being safe, just as safe as BlackBerry for business use, it seems that F-Secure is giving the “safest” award to Windows Phone 8 at the moment.
Meanwhile, Android receives a bashing for being the most unsafe, mostly because of 3rd party app stores with much less security features as the official one has, Google Play. However, Google is said to address some of the issues with 3rd party apps/stores in the new version of Android, 4.2.
Also one of the reasons that Windows Phone 8 is quite safe at the moment, probably is that nobody is really using a Windows Phone 8 device, so whey should they create malware and viruses for something that nobody uses? If/when Windows Phone 8 takes off, it will of course become a much bigger target for malware, so don’t buy a Windows Phone 8 device today, thinking that you will be on the safest platform forever.