Find my iPhone - prevent from theif turning it off with passcode?
Due recently I lost my iPhone 3GS as fall out of my tracksuit pants at the shopping centre while kneeing down and 45 seconds after I stood up = iPhone is gone. I immediately calling my iPhone from work's phone it was switched off. I had no hope to call it. I did have the passcode with 4 digit code on, but you still can switch it off.
Since now I have iPhone 4 setup with mobileme, and my wife's iphone setup as well so i can track both. But both iphones still can switch it off without passcode.
What I am asking, if a thief picks it up and does a runner - 2 minute later it can be switched off that way I cannot track it. Is there a way to install passcode at switch off so I can track it if it happens again.
Cheers
iPhone 4, iOS 4