Who stole my phone?

Where phones are becoming more and more powerful,more personal information is stored on them and their  is a demand for these phones, they will always be worth something to someone. I have had a phone stolen in the past, the actual phone wasn't really the loss to me, I could live with that, it was more the lost contacts that were the inconvenience to me. A while ago one of my students had their phone stolen while playing a sports fixture at another school, unfortunately it was very hard to prove who had taken it. For those who value their phone, please read on, this is probably the most important and valuable article that you will get to read.