Sprint text messages are free
I speak under correction, but when I was in the USA in 2003, I was told that Sprint (mobile network in the USA) doesn't charge for text messages. They ARE free.
Also, looking on their website now, their cheapest plan is $29.99 per month, which gets you 200 anytime minutes and UNLIMITED off-peak (after 9pm) minutes.
201 - 700 minutes, $5 for each 50 minutes,
Above 700 Additional Anytime Minutes only $0.10 each
They do however have to use Anytime minutes or pay the per minute rate even when receiving calls.
So at about R200 per month, it seems like they are getting a pretty good deal.
Hell, we pay R135 and up for a Vodacom Weekender contract, which only has 120 off-peak minutes. Minutes that would be FREE in the USA.
Even at 25c at bulk SMS rates we are being ripped off.