Nothing beats an overcharging scheme like cell phone text messaging.  What originally was envisioned as a small text paging add-on has become a massively lucrative service from America’s cell phone companies who rake in millions from one line messages.  In 2008, 2.5 trillion messages were sent from cell phones worldwide, up 32 percent from the year before, according to the Gartner Group.

Woe to those who send or receive text messages without a special texting plan.  Although the actual cost to send and deliver dozens of text messages is literally a fraction of a penny, almost every carrier charges a uniform 20 cents per message sent or received.  A text-happy teen can rapidly skyrocket your cell phone bill, as one Massachusetts father discovered.

[flv width=”480″ height=”380″]http://www.phillipdampier.com/video/WWLP Springfield Cell Phone Bill Shocker 12-26-09.flv[/flv]

WWLP-TV in Springfield reports on a Massachusetts dad confronted with a $500 text message cell phone bill last year.  (1 minute)

Texting plans typically add a few dollars to your cell phone bill, although unlimited texting can cost you a ten spot every month per phone from some providers.  For those customers receiving unwanted text message spam, most simply pay the bill, which only adds to provider profits.  Carriers promise they will credit customers receiving unwanted text messages, and several will block them altogether for no additional charge.  Carriers claim the popular text messaging service adds value to subscribers, and frankly utilizes less of their network resources than customers making quick voice calls back and forth.

Yet prices for cell phone text messaging keep increasing.  Some carriers originally charged just five cents per message.  Yet since the number of wireless phone companies have shrunk from six to just four today, prices have increased: first to 10 cents per message, then 15 cents, and today a near-uniform 20 cents per message. That generates profits credit card companies can only drool over.  In fact, doing the math, sending 140 bytes of data in a typical text message costs you one cent for every seven bytes of data.  That’s $1,497.97 per megabyte.

Senator Herb Kohl (D-Wisconsin) has had his share of constituent complaints from those who’ve received surprise enormous bills.  Kohl is chairman of the Senate Judiciary Subcommittee on Antitrust, Competition Policy and Consumer Rights.  He began investigating why text messaging costs so much.

“Text messaging files are very small,” Kohl says, “as the size of text messages are generally limited to 160 characters per message, and therefore cost carriers very little to transmit.”

Perhaps even less than Kohl suspects.  Text messages are limited to 160 characters because they ride across barely-utilized control data circuits cell phone companies use to manage calls.  Because these circuits are idle or underutilized, yet still occupy part of the spectrum, riding text messages across these channels costs carriers next to nothing, and don’t bog down wireless networks.  But that staggering bill can sure bog down your budget.