According to the Birdbrain web site....
"T-Mobile International has been a Birdstep EasyConnect customer since 2001."
But more recently....
"Smith Micro Helps T-Mobile USA Manage Hotspot Connectivity with QuickLink Zero, Powered by SODA" (August 2012)
Looks like SMSI is winning the connectivity battle with its QuickLink product range.
As always, good info--keep it coming!
Sentiment: Strong Buy