Cingular Wireless said it has completed its previously announced merger with AT&T Wireless Services Inc., creating the US's biggest wireless carrier with the largest digital voice and data network in the country.

All required federal regulatory authorities, including the U.S. Department of Justice and the Federal Communications Commission, have approved the transaction. Under terms of the agreement, AT&T Wireless shareholders will receive $15 per common share, or approximately $41 billion.

Cingular will now start opening access to both the Cingular and AT&T Wireless GSM networks to further improve coverage, allowing customers of both companies to use the new, combined network without roaming charges.  Customers also will have the ability to make unlimited mobile-to-mobile calls to any Cingular or AT&T Wireless customer.