Does iPhone 'Lost Mode' need an internet connection?

If i lose my iphone and turn it on lost mode. Does it need an internet connection to display the message?

A signal? Yes. Cell or Wi-Fi doesn't matter but it has to be some signal. It can't just find it out of thin air without some source. Battery doesn't matter there. Log in and see for yourself. Best luck.
https://www.icloud.com/...cloud.com/

Yep… I know pretty stupid. For example if you left your phone somewhere chances are its not on Wi-Fi and not on 3g. So all i could recommend is calls and texts.