[General] SOS, Need Help to find my phone!!!

Who can help me solve my problem.
My LG E730 smartphone is have in someones of my friends without a sim card but with an internet connection over WiFi.
How to calculate from where my smartphone connecting to internet, and how to find IP address of the phone?
P.S. I can install any application on it over Google Play in my account using browser!

What app can help me to track where my smartphone is??

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