This voicemail greeting will be played for both external calls originating from outside of your company and internal calls made by people calling from another extension within your company. Since you never know when callers will hear this message, it’s best to keep this greeting brief, professional and general.
Your voicemail greeting can make a positive or negative impression on people. By considering your target audience and tone, you should be able to keep it positive. Length: Don’t make people wait minutes to leave a message. Apologies: If people expect your to be available, apologize for missing their call. Set expectations: Let people know when they may receive a callback, but be realistic. Accuracy: If you change your voicemail for things like holidays, be sure to update it when needed. How do You Set Up a Business Voicemail?

Cell phone voicemail greetings are generally more personal and casual than office phones. Consider a greeting like “Hello, you’ve reached [your name]’s cell phone. I can’t take your call at the moment, but if you leave a brief message, I’ll get back to you as quickly as possible.”
The tone of your voice when leaving sales voicemails is almost as important as the actual words you say. If you obviously sound like a salesman, your message will be deleted before it even ends. You want to speak in a tone of voice thats friendly, confident, and casual—not overly excited, nervous, or desperate-sounding.