Tap Voicemail, then tap Set Up Now. Create a voicemail password. Choose a greeting—Default or Custom; if you choose Custom, you can record a new greeting.
Password: Make a note of your voicemail password—you will need this password to access your voicemail messages by phone. Also, you can reset your voicemail password at any time by clicking Reset Password. Set voicemail notification settings if you want to be notified when there is a new message (Enable Message Waiting Indicator), or have your

When you first set up your Android phone, it may ask you to record your greeting for the caller. You can also keep the default greeting stored on the device. But, in future, if you want to customize the Voicemail greeting or want to create a new one, then you may need to delete the old recordings from Android. It may not be necessary depending on the Android device model & version; it’s good to know the process.
I called customer support. They were not able to fix it and made it worse. Now it rings once instead of three times. They put in a service request and said it would be 1-3 days. Now they say 3 to 5 business days. I don't understand how something so simple could be such a major problem. I just wanted them to change the number of rings to at least 7. Disconnected the 1st of the junction boxes at top of door. Phone line rings after doing this so proves problem is in the home. I then ran a new wire pair to the NTE5, problem then came back, even with the pull out isolation port or whatever it’s called. Then wired direct to the back plate if that’s the correct term, phone starts ringing again.