Title. An ex of a friend of mine put a gps tracker on her car. We know it's there, that it is transmitting, and that it has it's own battery. I haven't physically looked yet, but I will tonight when she arrives. I was wondering if an rf detector would work or are there any apps I could use to detect it. I imagine it has a sim card and is transmitting that way. Figured ide drop through here to see what you guys know. She said she searched everywhere and couldn't find it. I wont have access to her car until tonight. Thanks