HTC Titan II and Nokia Lumia 900 AT&T Specifications & Price Details Posted by Unknown on March 31, 2012 ATT HTC HTC Titan II Mobile Nokia +2 Nokia Lumia 900 Smartphones Windows Phone Windows Phone 7.5 Mango ATT HTC HTC Titan II Mobile Nokia Nokia Lumia 900 Smartphones Windows Phone Windows Phone 7.5 Mango