Google Voice gains option to record voicemail greetings on Android and iOS
Up until now, Google Voice users had to go the web client if they wanted to record and manage voicemail greetings, but after the latest update, it's possible to do all these actions directly on your Android and iOS device.
If you want to start recording a voicemail greeting, you should go to the app's settings and scroll until you find a new “Voicemail greeting” option. Select “Record a greeting” and choose “Tap to record” to start recording your greeting.