Voicemail issues are apparently common across the range of iPhones. I have seen them from the older iPhone 5 all the way up to the iPhone XR. Sometimes it’s not the phone itself at fault, but the network that’s causing the problem. Sometimes it is the phone, and a few simple tricks can get voicemail working again.
How do I change my voicemail greeting on Android? Open the Phone app . Press and hold “1” to call your voicemail. Enter your PIN and press “#”. Press “*” for the menu. Press “4” to change settings. Press “1” to change your greeting. Follow the recorded instructions. Access your main voicemail menu. Listen for instructions to enter your password. From the main menu press 3 for Personal Options. Press 2 for Greetings. Press 1 to Change Greeting. Press 1 to Record personal greeting or press 2 to select the standard greeting. Tap on Call settings and select Voicemail. Tap on Voicemail service and select My carrier or My operator. Tap on Setup, select Voicemail number and type in your voicemail number. Tap on OK in the Voicemail number changed popup.

The script is relatively similar, but the doctor is including a good reason for not being available, so patients don’t feel like they’re being ignored. He’s also left another avenue for patients to get in touch if they need some urgent help.
Access to Visual Voicemail does not negate traditional voicemail access. You can still access it by tapping the 1 key on your phone.