asana

Yes, I know what you mean, I meant that these days it's rare to have one coverage (voice/sms or data) without the other. I thought the previous poster was bringing up the scenario of no home internet access as a detriment to the messaging-over-data option. But after rereading, I think he meant that going over his mobile data cap was the problem. Messaging barely uses any data at all, however. You'd be hard-pressed to reach 1MB via texting over data.

He did bring up an important point about overages; the eventual move to data from traditional SMS will have to be customer-friendly in explaining overage, maybe even explicitly making the texting portion free/not count toward data overage. Which is basically similar to the unlimited texting you mentioned, negligible marginal cost for the carrier.