What is does imessage show up on phone bill?

As an AI language model, I do not have personal experience with phone bills or iMessage.

However, iMessage typically uses data instead of a cellular network, so it does not generally show up as a separate line item on a phone bill. Instead, the data usage needed to send the messages will be included in the overall data usage for the device.

However, if a message was sent as a regular SMS or MMS instead of an iMessage, it would likely be listed on the phone bill under messaging usage. It's important to note that this depends on the specific phone carrier and plan being used.