After pressing the Voicemail tab, all of the voicemails stored on your device will display. From here, you’re going to want to tapGreeting located in the top left. There will be two options located on the Greeting page: One option to utilize the default voicemail message and another to record a custom message.
1. Open your Android’s Phone app. It usually looks like a phone receiver at the bottom of the home screen.

Android smartphones come pre-installed with the Samsung Visual Voicemail application.
From a Home screen, tap the Phone app . Tap Voicemail .Tap the desired message then tap the Trashcan icon . Tap Deleted Messages.Tap Clear All (upper-right) then from the prompt.Tap Clear All to confirm. Select the Voicemail tab. Note: Alternatively, from the phone app, select the Keypad tab > select and hold the 1 key > if prompted, enter your voicemail password > follow the prompts to listen to your messages. Select the Voicemail tab, then select Set Up Now. Note: Alternatively, you can set up voicemail by selecting the Phone app then pressing and holding the 1 key. If prompted, enter your voicemail password, then follow the prompts to set up your voicemail.