Setting up voicemail.
Hold down the ‘1’ key on your phone keypad to dial your voicemail access number. Calling your own 10-digit phone number will also bring you to your voicemail.
Hey, I recieved a notification to install a new voice mail. It was asking for a 4215 number. What should I enter for a 4215 number?
Install a new voice mail? You you can recieve and check it without need to install any separate app. What is a 4215 number?
it should say 4 to 15 character as your PIN
I would highly doubt the company would send a message asking for a code in a short-form manner like that. I would suspect this is spam/phishing.