If you want to add another condition to your rule, select Add condition. You can add multiple conditions to a rule but do this judiciously so your rules don't become overly complex.
After creating, the Voicemail Greeting, you can test it by calling to your number from another phone, and see if it is playing correctly or not. Open the Phone App. On the lower screen, tap on the Voicemail option. Select Custom, with this option, you can record the personal voicemail greeting on the iPhone. Tap Record, to start recording the voicemail greeting message on the iPhone. Greeting samples are given in this article below, Once you are done with recording, tap Play to listen. Lastly, if everything is alright, and custom voicemail recording is perfect, then tap Save.

Tap on Voicemail; From there, you can turn Voicemail on or off, set your Greeting as a default (or record a custom greeting), and turn Voicemail Transcription on or off. Record your own voicemail greeting. Note: Recording a custom voicemail greeting is only available through our iOS or Android app versions.
Click on Audio Library Click Add Audio Speak into your mic to get level then click Next