If you have a Samsung S20 phone, there are a few ways to delete voicemail. The first way is to use the phone’s menu system. To delete voicemail, select the “Delete voicemail” option from the main menu. After you select this option, your phone will ask you to confirm deletion. If you decline to delete voicemail, your phone will continue to store messages in your voicemail until you choose to delete them. The second way is to use the “Call history” feature on your Samsung S20 phone. To delete voicemail, select the “Call history” option from the main menu and then select “Delete.” After you select this option, your phone will ask you to confirm deletion. If you decline to delete voicemail, your phone will continue to store messages in your call history until you choose to delete them.