Open the Phone app
Tap Voicemail
Select the voicemail you want to save
Tap the Share button
Choose Save to Files, Voice Memos, Messages, Mail, or another app
Select a folder or destination
Tap Save
To keep a voicemail in the Phone app, do not delete it
To save multiple voicemails, repeat the steps for each one
If your carrier supports visual voicemail, the voicemail may remain available until you delete it
If needed, use a screen recording or audio recording app to preserve the voicemail externally