3g data sim only? Can I make calls texts?

[Hooa]

I have an o2 dongle from work.

If I bought a cheap smart phone I guess I could use the sim in there and thether or just use the phone to check emails etc without booting the laptop on.

If I am in an area with 3g could I also use it to make phone calls to normal phones via something like skype?

Is there any messaging services I could use to use the data to send text messages to people?

Thanks!

 

[Hooa]

Thanks guys. Think I might give it a go and make the most of having this SIM