Streetwize gps satellite vehicle tracker this gps satellite vehicle tracker is a fantastic security device for vehicles and personal use also unlike many they are subscription free and simple to both set up and use with all setting pre programmed at the factory for ease simply buy a payg pay as you go sim card on the vodafone network add credit of 5 insert tracker and power it up then send a text message from your own smart phone or tablet to the tracker and it will send you back a