Find my iPhone useless in case of stole? Possible Duplicate:
  Lost iPhone, what action to take?  




Consider this scenario:


A thief stole my iPhone. 
I disable my iphone on www.icloud.com
The thief in the meanwhile reinstall iOS 


Does Find my iPhone is useful in this scenario?
If you wipe the phone, no.

If they wipe the phone, no.

I'm going to close this, but feel free to flag or edit it if you feel there is something missing from these answers.