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.
You can also share and save visual voicemails. Tap the voicemail you want to interact with, and then tap the share button to the right.

Hello, you have reached X (the service provider), the one-stop destination for your pet care needs. Right now, all our staffs are busy attending client calls. You may choose to stay online until they get free or leave your number and details so that we can call you back. Alternatively, try our live chat for immediate needs.
When you reset network settings, all of your iPhone’s Wi-Fi and cellular network settings will be erased. This includes your Virtual Private Network (VPN) settings, your Bluetooth devices, and your Wi-Fi networks — so make sure you write down your passwords first! We do this step because it can be very difficult to track down the exact source of a software problem, so we reset all network settings.