In retreiving a deleted voicemail, someone said you could get more options if you hold the voicemail header for a few seconds. What does that mean....where is the voicemail header? In settings, or when you are listening to a voicemail message?
Hard to tell you that if we don't know what you are using. Voicemail systems are not exactly universal/identical. You might not even have a header. Have you tried perhaps asking the person who told you this?