Recovering your Stolen Mobile Device is not always an option
Having lost my devices before, I found out that the "lost my iPhone" app absolutely useless in recovering my stolen device. That said, many give you the illusion of being able to locate your mobile phone once is it lost. Truth is, it never happens unless the person who stole it was stupid enough to continue using your stolen device without ever erasing it.
Regardless if it is an iPhone or Android mobile, chances are you're not getting it back if someone stole it. But you can protect your data from falling in the wrong hands and that is priceless.