Offer other contact information such as a cell phone or email address if you will check it (i.e. on vacation). DON’T: Be too informal, even if you are creating a humorous message. Give a prolonged sales pitch in your voicemail greeting message. Waste a caller’s time with an excessively long greeting before they can leave their message.
A voicemail system (also known as voice message or voice bank) is a computer-based system that allows users and subscribers to exchange personal voice messages; to select and deliver voice information; and to process transactions relating to individuals, organizations, products, and services, using an ordinary phone.

According to 9to5Google, Google's dialer app for Pixel, Nexus, and Android One devices is being upgraded with the ability to send spam calls straight to voicemail. "In 2016, the app began alerting users to potential spam callers by flashing the incoming call screen bright red, with another 'Suspecte...
Unlimited recording is free with Rev's service, there's unlimited storage, and you can share the recording all you want. It only charges for transcriptions (it's $1 per minute but offers top-notch accuracy, according to our review). The Rev Call Recorder app, only on iOS, is free. Don't confuse it with the Rev Voice Recorder mentioned above (also free, for iOS and Android), which is for recording in-person conversations.