Mitel Announces Fourth Quarter and Fiscal Year 2013 Financial Results Conference Call

June 14, 2013

MitelĀ® (Nasdaq:MITL) (TSX:MNW), a leading provider of cloud and premises-based unified communications and collaboration (UCC) solutions, today announced that it will release its fourth quarter and fiscal year 2013 financial results after the market closes on Monday, June 24, 2013.

The company will host an investor conference call and live webcast at 5:00 p.m. EDT (2:00 p.m. PDT) on the same day. To access the conference call, dial 866-322-1159. Callers outside the US and Canada should dial 416-640-3404. The webcast will be accessible on Mitel's investor relations website at http://investor.mitel.com/.

A replay of the conference call will be available through Saturday, June 29, 2013. To access the replay, please dial 888-203-1112 and enter pass code 2171897. Callers outside the US and Canada should dial 647-436-0148 and enter pass code 2171897.

About Mitel

A global market leader in business communications powering more than two billion business connections, Mitel helps businesses and service providers connect, collaborate and provide innovative services to their customers. Our innovation and communications experts serve more than 70 million business users in more than 100 countries. For more information, go to www.mitel.com and follow us on Twitter @Mitel.

Mitel is the registered trademark of Mitel Networks Corporation

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Contact Information

Camille Beasley, Media

Tel: 469-212-0433

Email: camille.beasley@mitel.com

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