Research In Motion brought the BlackBerry 7230 device to the U.S. in partnership with T-Mobile USA. The BlackBerry 7230 lets users access email along with the Internet and voice networks around the world. It is now available in the U.S. for $399.99. Computerworld reports that T-Mobile will charge $29.99 per month for unlimited email and other mobile content, while the voice service fee is separate.