Does iMessage for iPhone show up on the phone bill

I have an iphone 4. I'm wondering if iMessage shows up on the phone bill? If so, what shows up? I need to know if the times the messages were sent are on the bill, the number the iMessage was sent to is on the bill, or even if it's on the bill at all. I've heard that it isn't and that it is. It's very important please help! BTW I have unlimited talk and text but limited web.

IMessage is a internet-based protocol, just like Whatsapp. You will only be billed for the internet that it will use up, and unless you're sending pics and videos to each other all the time, it won't be that significant.

It's free over Wi-Fi, and chances are that you have at least some free internet included in your contract.