CNNMoney.com wants you to check your next wireless bill carefully--particularly if you've been texting a lot.

According to Forrester Research, now more than one-third of all cell phone subscribers are texting, sending almost a billion messages each day. But as the report said, "if you don't shell out for a texting package, which can cost $3 to $20 a month depending on the provider and the plan, most carriers will charge you for each message whether sent or received, read or unread, solicited or unsolicited."

Many consumers know this by now. But the ones that don't are getting shafted even more than they used to. Earlier this year, T-Mobile, AT&T, and Verizon all raised their rates to from 10 cents to 15 cents per text message. Sprint went further, raising their cost to 20 cents per message. Those prices are only for domestic messaging; international rates are still higher. This is despite the fact that text messages take up virtually no space on the carrier's data networks, the article said.

OMG! Text message charges soar [CNNMoney.com]