It’s a good practice for each of your team members to have their own personal business phone numbers. There are many reasons why they shouldn’t use their personal cell phone number for business, so you’ll want to give them their own phone number through your VoIP provider or phone system.
Don’t rush. It’s important to speak slowly and clearly when leaving your next voicemail greeting. Have you ever called someone and the message sounds like one big word? Don’t be that guy. Pronounce your words and take pauses between your sentences

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If you don’t know what to say in your voicemail, here’s a few pointers to get you started: Make sure that you’re not yelling into the phone and the message is recorded in a somewhat quiet area. If the message is for work, try to keep it professional and avoid mistakes, if possible. If you’re working in retail, apologize for not picking up and note that you will call them back. Regardless of your occupation, try to keep the message short. It shouldn’t be longer than 25 seconds. If the voicemail is personal, feel free to leave a silly, short message that lets the caller know it’s you.