Two big cell phone companies have struck a deal with the state of Missouri to change their bills. After this, customers will know what parts of their bills are taxes and what parts are add-on charges. The Attorney General had gone after Nextel and Sprint, charging they tried to make the add-ons looke like taxes. The agreement also says the companies will clearly disclose in their advertising what their added charges are. Companies can still charge the add-ons, but the Attorney General’s office says consumers will be able to do better comparison shopping by knowing the specifics in the ads now.