Can my workplace monitor the calls and texts I make on a cell phone they provide for me?

We have Information security department in the company and they do track workers. Not to copy things, not to send e-mail with the company’s information out and more. There are even Web sites blocked. But will they have the right to read my private and personal messages I send to my friends for example?

Should I be carefull with my SMS I send?

It is personal thing I think…