More than a million consumers worldwide are now using T-Mobile USA's free Bobsled IP communications services, the operator announced.

T-Mobile USA first launched Bobsled Calling in April 2011. Powered by voice services provider Vivox's VoiceEverywhere technology, Bobsled Calling enables users to place free Internet calls over almost any data connection, across devices including iOS and Android smartphones and tablets. Bobsled Calling is available for download from Apple's App Store and the Google Play storefront.

The cloud-based Bobsled Messaging application, developed in conjunction with HDmessaging and released in January 2012, allows Android users to share rich media messages with other Android device users as well as iOS, Windows Phone and BlackBerry smartphones and even most feature phones. Bobsled Messaging is available for download solely from Google Play. 

Bobsled services are available to consumers on any wireless operator network, and T-Mobile USA said that 95 percent of Bobsled Calling users are in fact not T-Mobile subscribers. The carrier added that users have made more than 10 million calls since Bobsled Calling launched last year, with 80 percent of those calls originating from international numbers. Bobsled Messaging users are predominantly U.S.-based, and 90 percent of all messages are sent domestically.