It was originally launched in Australia through Optus in 2000 and in New Zealand through Telecom New Zealand in 2001.
The newly merged company adopted the iconic AT&T logo and T (for “telephone”) stock-trading symbol.
The current AT&T network reconstitutes much of the former Bell System and includes ten of the original Bell Operating Companies, along with one in which AT&T held part ownership (Southern New England Telephone) and AT&T’s original long-distance division.
Based in Bellevue, Washington, T-Mobile USA is currently the fourth largest wireless carrier in the US market behind Verizon Wireless, AT&T, and Sprint, with 33.8 million customers at the end of the third quarter of 2010 and annual revenue of US$21.53 billion for its 2009 fiscal year.
T-Mobile USA pioneered a number of features: it was the first US carrier to launch a ringback tones service nationally (Caller Tunes), video messaging, and “Hi Fi Ringers” (ringtones that are clips of actual songs), and it became the first company to use and promote Google’s Android operating system with the launch of the G1.
Boost Walkie Talkie only connected to other Nextel/Boost IDEN subscribers.