The cost of sending an SMS to your mates has soared over the last four years with many of you racking up bills of more than £100 a month.

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.