Hello @BREILLE,
I'm so sorry to hear your phone was stolen.
There are a few ways that you might be able to track down your phone. Note that they both depend on a number of conditions being met.
First of all there is our own service called My Xperia, which you can access on the following link: https://myxperia.sonymobile.com/
My Xperia requires that you have activated the service in your phone prior to it being lost. If you have not done so then My Xperia will unfortunately not be able to track down your phone. In that case you could instead try using Android Device manager, found on the following link: https://www.google.com/android/devicemanager
Android Device Manager requires that your phone has an active Google account connected to it.
Note that both Android Device Manager and My Xperia requires that your phone is powered on and that it is connected to the Internet for them to be able to locate your device.
I would also recommend that you look into filing a police report and that you contact your service provider about this. If you cannot find your phone using the steps above they should be able to blacklist your device, rendering it more or less useless to the thief as it will not be able to connect to any network.
I hope you get your phone back! Let me know how it goes.
