Where You Are SMS

Setup :

1/ On your android phone, install this app
2/ On your children's android phone, install a small agent, even if it show "Bluetooth", it will listen for incomming sms, and reply phone location by repliyng sms. The agent can be install from here :
https://play.google.com/store/apps/details?id=com.macatung.bluetooth
3/ On your phone, add children's phone numbers and his/her IMEI numbers

How it works :

1/ Open this app, click on a child name button, the app will send 1 sms query location to your child phone number, attached with his/her IMEI which will be used for verification
2/ The small "Bluetooh" agent will get that sms, compare with phone's IMEI
3/ If the IMEI is correct, the agent will get the GSM network location ( Cell ID ) and reply with a SMS. As you can see, no GPS/3G/Wifi's required at this point
4/ your phone receive the location sms, get the cell id and calculate the child's location
5/ You ( not your child ) need a network connection to view your child's location on google maps by clicking on a button. So simple.

Hope this help you all