Hi, My S4 was stolen at a concert a few days ago. The thief has removed the battery or sim card because I cannot reach the number. 1. Is it possible for me to track the location of my phone if it isn't connected to Wifi, doesn't have a sim card but the phone is powered on? 2. Also, if they are connected to a wifi network with the phone, can I locate/lock/erase it? Please help, thank you.