of Motorola, Lexicus introduced some of the first devices with Chinese handwriting and speech recognition. In 1999, he founded Cellmania, a mobile infrastructure company that provided digital rights management for mobile content, enabling the creation of some of the first mobile app stores. Cellmania was sold to Research in Motion, now BlackBerry Limited, in 2010 for an undisclosed sum.

Nag is President of the which develops and funds AI and Longevity projects. Nag is also Chairman of Bounce