Now the people who make sure we get fair deals say an investigation should be launched to find out why it's costing up to 12p a go.
Why so expensive?
Texting's bigger than ever, and TV shows like Fame Academy and Big Brother encourage kids to text even more with their voting systems.
So the National Consumer Council wants to know why the price of texting's gone up so much compared to other things.
They think it might be because recently mobile companies had to make their calls cheaper, so they need to make money another way.