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.
If you want to add another condition to your rule, select Add condition. You can add multiple conditions to a rule but do this judiciously so your rules don't become overly complex.

Your iPhone can now send spam calls directly to voicemail — here's how to set it up. But, if your iPhone thinks it knows the number — like if you've called someone who isn't in your phone In one instance, for example, I had this turned on and my colleague's calls kept going right to my voicemail.
Here are 5 sample scripts for business voicemail greetings that will make you and your company look personable, knowledgeable, and professional. And here are some sample voicemail greeting scripts for doctors, lawyers, and dentists, in case you're not looking for business greetings.