reset your voicemail PIN on a Yealink phone

To reset your voicemail PIN on a Yealink phone, you can try these
steps:
1. Press the Message button (may look like an envelope)
2. Enter your passcode (the default is 7788#)
3. Press 9 for mailbox options
4. Press 5 to change your voicemail PIN- This option is to recover
   deleted voicemail on my phone. 
5. Enter your new PIN and press #
6. Press Star to save