At the moment...no. I read somewhere that they are developing the technology for CDMA. So, eventually, we might see Sprint and Verizon with this capability.
Malial....that is not true....there are actually 2 others in the US that have it....but they are not nationwide: Southern LINC - Southeast Pacific Wireless - Central California Both provide it. There are also many others around the world.
Jack... southern linc just recently became a partner with Nextel on November 12, 2001. But they do run their own system that "covers 127,000 square miles in the Southeast, including major metro and rural areas in Alabama, Georgia, southeastern Mississippi and northwest Florida." I can't find too much info about Pacific Wireless other then a while back Nextel bought much of Pacific Wireless spectrum.
Yes,... Nextel is the only game in town. They have purchased most of Pacific Wireless and are currently looking at Southern Link, they currently have an roaming agreement with each other for the time being, witch give's Nextel customer a great advantage in the Southeast. I don't foresee see any other carriers having a "two way" service in the near future, it's very expensive.