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WhatsApp Messenger for Symbian has been updated to version 2.11.75 which presumably brings some bug fixes and performance improvements. WhatsApp Messenger is a cross-platform messaging app which allows you to exchange messaging with your contacts without having to pay for SMS, by utilizing the existing smartphone data connection (or Wi-Fi when available).
You can download the update by using the following link:
The developers also released WhatsApp Messenger version 2.11.1 for the Nokia Series 40 platform.
WhatsApp Messenger is available on Nokia S40, Symbian, iOS, Android, BlackBerry and WindowsPhone