Both mobiles and bikes are an easy target for thieves. Fortunately, technology advances to help us and make life difficult for criminals. For the next generation mobiles you can download applications for tracking in case of theft or loss, for instance on iPhone you can use Find my iPhone, and if you have Android: Prey. Unfortunately these applications will not ensure you get your phone back, but you should install them because they provide another layer of security, making things more difficult to thieves.
Source: How to track your bike in case of theft, using your mobile phone? | Techie Fans