cellphone tracking

[myposbussie]

Hi,

I lost my phone a while back but then I did not know anything about tracking and gps.

Now I am getting a new phone and want to make sure when I lose it again I must be able to track and find it.

I heard that there is software you can load on your phone and then it will (when activated with and sms) send you the coordinates of the phones location.

I need it to be free and I do not want anything to do with emergency call centers or anything like that, it must only be a program I load on my cell and and when I send it an sms it must send back its location.

Thanks