fcrontab -l gives:

*/20 * * * * /usr/share/prey/prey.sh > /var/log/prey.log

But i have a question. Does it should send a report even when the phone is idle? Or does it need the phone to be used for at least 20 minutes before it will send a report?

Because yesterday in evening, while i was going home, it created a report by itself... I was not able to reproduce that so i don't understand.

thanks for your help