Is there any way to retrieve deleted voicemail messages from your nextel phone after you hung up?
There is no normal way to do this. Assuming their voice mail system is backed up and your message was on the system long enough to be backed up you might be able to get it back with a court order. Short of that, it is gone.
no, once you delete it and hang up it is gone. Court order or not you can not get it back.