Unwired Planet, LLC

Openwave Systems Inc.

Mingzhe Zhuang

Madhukar N Thakur

Francisco Jose Kattan

A system and method for providing prepaid billing for users of an instant messaging system. A method includes determining whether a prepaid account balance associated with an IM client request satisfies a pre-determined criteria, establishing a regular IM session if the prepaid account satisfies the criteria, and establishing a limited IM session if the prepaid account does not satisfy the criteria. The system includes a prepaid account screener operable to determine whether a prepaid account balance satisfies the criteria, establish a regular IM session if the prepaid account satisfies the criteria, and establish a limited IM session if the prepaid account does not satisfy the criteria.

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Redwood City, CA, United States of America

Mingzhe Zhuang