posted this on January 24, 2012 17:57
The "Certificate Expired" message can mean any of the following:
For information on how to update your device software with Nokia, please visit Nokia's website: http://www.nokia.com/global/support/locations/
If you are using a Sony Ericsson Vivaz phone and you are still having the problems after checking the above, unfortunately this is a known issue and there is nothing we can do to help at this moment.
Cheers, WhatsApp Support Team
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