Tracking a phone with no sim, but with gps enaled

[AC Question]

Hi, the thing is Im selling phones inside my country and sometimes send them outside of my country. Since im selling expensive phonesit would be really really nice to know exactly where they are at the moment. Is there an app that I could install into the phone tham im sending that would allow me to track it using ONLY gps? All apps seem to require internet connection. I really dont understant why cant I fing ANY app that uses ONLY GPS data? Any idas?
Thanks A LOT!

 

[Almeuit]

re:

Most all require data -- If you're selling the phones you should not be trying to put tracking software on it for your seller. Just buy insurance with the shipper.

Good luck!