The worst part is that it wasn't even free, you were still paying for the data unless you were on wifi. Standard text messaging was so expensive (and so terrible) that data rates obliterated standard phone services in both quality and price.

I remember paying 23 cents per SMS. Still, carriers were somehow surprised when people moved away from them.

Funnily enough, now that RCS is slowly making its way back, people seem to forget that free unlimited messages are hardly guaranteed with these services. Can't wait for the backlash when the first iPhone users start getting charged for RCS messages with their Android contacts.