Can police get imei off iphone 4 if it is switched off and has a passcode?

Lost iphone, police may have it, they asked for imei, but the phone had no charge and even if it was switched on there's a passcode whoch would
make it near
impossible to get imei, what i'm saying is is it possible they could have my phone and not lnoe because they used inei to identify them?

Nope

Yes, it should be printed on a label behind the battery.

I'm afraid its impossible to locate your phone if its switched off, however if your phone has been " stolen " and the guy who has it turns it on, connects to internet or uses your sim, you can locate it by using " locate my phone " available on Apple.com

Nope

Yes.
It's etched in to the edge of the SIM tray on the iphones 3 & 4

(For info, it's etched it to the lower back on an iphone 5).

For anyone who's not written their IMEI down, it's also on a label on the original Apple box the phone came in.

It would be a good idea to call AT&T because when i bought my Phone (AT&T Store) they wrote down my serial number and IMEI number so my guess is if anyone tries to reactivate the phone AT&T would have those serial numbers on file.

For myself, I have installed anti-thief app onto my phone. It will be helpful if my device gets lost, which will send me the SMS, web history, and even social network activities if the people who pick up the phone use my device to contact others. Check it out http://www.spy-mobile-phone.com/