The invention of the smart phone changed the use and perception of telephone calls. Not only did mobile phones make home phones unnecessary for many, but the ability to send and receive text messages or emails on a smart phone made calls themselves feel unnecessary. Even in many workplaces, answering the phone is now either impossible due to nonstop time demands or discouraged by company cultures that prioritize digital communication. Whereas calls once stood out as important and sometimes fun, more people find them time-consuming and frustrating.
A good cell phone voice mail greeting is clear, courteous and to the point. Enunciate, don't mumble, to make it as easy as possible for those with poor hearing or bad connections to be able to hear your greeting. Be polite, and save swearing for the conversation, if applicable.

If you still have this for a greeting, you might be interested to know that your friends hate you.
When you want callers to leave a message, make sure your voicemail greeting indicates that. Be sure to keep your greeting short and direct, and include the info you want to capture.