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.
Your voicemail message should ideally answer all of the following requirements: Brief -- nothing bores callers as much (or makes them hang up as often) as long voicemail messages; Informative -- if it's your professional voicemail, say your name, business, and if necessary, department. Let your callers know when to expect a return call

No one wants to listen to a two-minute voicemail greeting. Keep it short and upbeat and start with a simple “Hello! Thank you for calling !”. If you make your voicemail greeting too long, customers will feel like you are wasting their time.
Using the best business phone service can provide your small business with affordable features like call queuing, hold music, call routing, caller id, and more.