how to find my location for a dead lost iphone

The phone must be turned on and connected to the internet in order to send a location message. You will have to search the old fashioned way...

If the phone is not powered on, or it does not have a connection to the Internet, you won't be able to "see" the phone. About all that you can do is look for the phone the same way that you would look for your car keys if they are missing.