AT&T, T-Mobile follow Verizon

SAN ANTONIO -- AT&T Inc. Tuesday launched unlimited voice plans targeted to wireless users seeking flat-rate pricing for unlimited minutes. The plans will be available to new and existing wireless subscribers for $99.99 a month for unlimited U.S. calling on all devices with no domestic roaming or long distance charges. The new plans will be available Friday. In addition, T-Mobile USA said Tuesday it would offer unlimited text messaging and voice calls for $99.99 a month starting on Thursday. Verizon Wireless offered similar new plans that started Tuesday.