If you are experiencing any of the following problems, there is probably an issue with your network connection.
If your sent messages only show one check mark, there is nothing wrong with your phone's connection. Please read this article for more information.
First, please make sure that you have downloaded the latest version of WhatsApp from our website.
Then, try the following steps to see if you can fix it:
For more information regarding connection please read this article.
If none of these steps work, you may be experiencing a temporary connection issue and should try connecting later.
If after a while you still can't connect, try contacting your mobile provider and BlackBerry to see if they can help you.
Note: WhatsApp recommends a full BIS (BlackBerry Internet Service) data plan in order for WhatsApp to function properly.
WhatsApp Support Team