There was a good period of time when my cellular bill was outrageous. For what I was paying, I expected to be able to communicate Mars. Once you add up the voice minutes, text minutes, cellular data, service fees, the cost of the phone, insurance AND repairs, it's just too much.
Say you want to send a billion messages per day without paying a cent out of your pocket. Who doesn't? Even though I don't think that's physically possible, I know it's theoretically possible.
Luckily, I know of an essential app that lets you it lets you send voice, picture and video messages, all for free. You'll even be able to group chat. The app uses your existing phone number and integrates automatically with your contacts list. It also lets you text for free from overseas.