Hi and welcome to Android Forums!
Oh, no! Somebody nicked your beloved phone? Fear not: if it's still under your account and hasn't been reset, you might be able to push an app called
Plan B to your phone. You can then track its location on a PC and hopefully recover it.
If that fails, make sure you call your provider so they can mark the phone's EIN as stolen, making it virtually impossible to re-activate by someone else.
Going forward, I suggest a free app called
Cerberus on your phone. It is brilliant in what it does to help you recovery your phone, even secretly snapping pictures of the new user and sending them to your inbox.
I hope this helps and good luck!
It’s great to have you here
