Hi there,
From past analysis, it turns out that with the current plans, if you're already choosing a talk and a data option but no text, the cost is identical if you add text, due to the increase from pick 2 to pick 3 discount offsetting the cost of the texting option.
With that in mind, and seeing several threads since the new plans went live where folks accidentally activated with talk + data but also wanted text, I'd suggest that PM should auto-upgrade them to include text, since the cost to the customer is $0 to add it.