About synchronization and reconciliation
The wireless data synchronization feature is designed to synchronize organizer data (contacts, calendar entries, tasks, and memos) between your BlackBerry® smartphone and the email application on your computer over the wireless network.
The wireless email reconciliation feature is designed to reconcile email between your smartphone and the email application on your computer over the wireless network. When you file or delete email messages on your smartphone, these email messages should be filed or deleted in the email application on your computer. Likewise, any changes that you make to email messages in the email application on your computer should be reflected on your smartphone.
In rare cases, if your smartphone doesn't recognize fields in a contact, calendar entry, or email account, some data or email can't be synchronized or reconciled.
If wireless data synchronization isn't available on your smartphone or if you turned off this feature, you can use the BlackBerry® Desktop Software to synchronize your organizer data. For more information, see the Help in the BlackBerry Desktop Software.
Research In Motion recommends that you regularly create and save a backup file on your computer, especially before you update any software. Maintaining a current backup file on your computer might allow you to recover smartphone data if your smartphone is lost, stolen, or corrupted by an unforeseen issue.