You should install monitoring software Hellospy. It is very good software, is it is cheaper too. I have many friends are using this software, and who also feel satisfied at all. I'm free trial and feel like Hellospy.

Try calling your carrier. Ask what your options are in locating your lost phone. Maybe they can track it or check the last location where it was used. Also, have you tried calling your phone? Maybe the person who got it is an honest person and willing to give back the phone, just waiting for you to contact him. Hope you get it back. Good luck!