Great news! Cell phone owners can now unlock the software on their phones, thanks to a new copyright rule approved by the Library of Congress.Cell phone owners will have the ability to take their phone with them from wireless carrier to wireless carrier.  Thank goodness! Under the new copyright rules, cell phone owners will be allowed to break software locks on their handsets in order to use them with competing carriers.Librarian of Congress James H. Billington approved six exemptions, the most his Copyright Office has ever granted. Other copyright exemptions approved by the Library of Congress will let film professors copy snippets from DVDs for educational compilations and let blind people use special software to read copy-protected electronic books.