Thanks guys. Regarding the data plan cost, the comparison would be:
- $5 or $10 / mo for SMS
- some cheap form of data plan, say $10 or $15 with a small cap. That's because texting itself uses minuscule data. Image, voice, and video messages would use more, not sure how that works with just a SMS plan.
Then, people can move onto data for roughly the same or slightly more cost per month while getting potentially better messaging service (Joyn would provide QoS whereas SMS is best-effort), as well as all the other benefits of data. Joyn would also be tied to the phone number so no need to ask your counterpart to get a certain app.