For the cost of one of those $99 unlimited plans (which will be about
$115 after taxes and fees), you could buy about 2150 minutes on a
prepaid network (at about 5.3¢ per minute). That's about 35 hours a
month. Other than certain business people, i.e. realtors, field service,
etc., how many users actually use over 2000 minutes per month?

PagePlus charges as low as 5.3¢/minute for voice, and as low as 3.5¢ per
text message (when you buy the $80 "1400 minute" card at a discounted
price of $74). They also offer unlimited voice minutes for $2.49 a day,
or $75 for a 30 day month.

It seems that too many consumers look at the "unlimited" part, without
understanding that $99 is a) not really $99, and b) not such a great
deal compared to non-unlimited plans, and c) a lot more than they have
to pay for unlimited voice.