Exhibit 99.1

Openwave Announces Extension to Stock Option Exchange Program for Employees

REDWOOD CITY, Calif., Sep 11, 2001 /PRNewswire via COMTEX/ -- Openwave
Systems Inc. (Nasdaq: OPWV), today announced that it has extended the voluntary
stock option exchange program for its employees, previously announced by
Openwave on August 1, 2001. The stock option exchange program has been extended
by six days until Monday, September 17, at 8pm Eastern Time. Without this
extension, today would have been the last day for eligible employees to elect to
cancel options in exchange for replacement stock options.

The replacement stock options will be granted with an exercise price equal to
the fair market value of Openwave stock on the date of grant, which will be
between six months plus one day and seven months after the option cancellation
date. Due to this extension, the option cancellation date is now September 17,
2001.

Openwave Systems Inc. (Nasdaq: OPWV) is the worldwide leader of open IP-based
communication infrastructure software and applications. Openwave is a global
company headquartered in Redwood City, California. For more information, please
visit www.openwave.com.
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For more information, contact: Alexandrea Todd of Openwave Systems Inc.,
+1-650-480-4346, alexandrea.todd@openwave.com
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