Is it possible to use iMessage on an iPhone with no service?

Is it possible to use iMessage on an iPhone with no service? - 1

IMessage needs some form of Internet connection, if you don't have service (meaning no 3G/4G) then a Wi-Fi source will work. No internet connection = no iMessage

Wi-Fi works.

It works over celltower or Wi-Fi, so yes even without a msg plan it still works free over Wi-Fi.