Does iMessage use up my data plan?

So I got a new iPhone yesterday and I want to know if iMessage uses up my data plan when I send to other iPhones. I have unlimited text messaging but my data plan is a shared 6GB. Does iMessage use that data plan to send the messages or does it use the texting plan?

Nope! Its 100% free messsaging!

Yes it does. It uses up your data unless your on Wi-Fi.iMessage needs an active data connection to send and receive. It shouldn't waste your data harshly though.