Deleting a Contact List
There are situations where BlackBerry Contact List on the device becomes corrupted or remains associated with wireless sync account which is no longer available and needs to be removed. To remove a Contact List and restore default Contact List go to Contacts and click Options. Then type rset, it will pop up with a screen asking if you want to wipe the contacts, select yes through all windows. You can then wirelessly sync or use desktop manager to repopulate contacts.