If you would like to know what is really going on have a peak at using the field debug feature . You may also check your voice messages free from your PCS phone by dialing your own number. If you are within Canada then there are no long distance charges to check your messages. Regular airtime charges still apply. This is also how you can get rid of the icon if you received the message in a digital zone but are now in an analog zone.
Urgent messages show a flashing icon.
Users can either send you a message via email or from the Clearnet website. You can either ask for a re-flash with a valid reason or wait for them to contact you. ROM Re-flashes update your phone's current firmware version.