Phone Call Recorder - ACR is "free." It trumpets that all call recordings, incoming or outgoing, even photo calls—meaning FaceTime calls—are unlimited in length. But that's if you upgrade via in-app purchase to the pro version for $59.99.
On the Phone tab, click the voicemail icon below the dial pad, and then click Change Greetings. Skype for Business calls your voicemail and guides you to record a personal greeting.

Follow the instructions and press that number. You will be asked to delete your current Voicemail greeting. Click on the ‘Yes’ button that appears on the screen if you want to remove that. You can save your new recorded Voicemail greeting or can use the default recorded option. From the home screen, select the Phone app. Note: Alternately, you can set up voicemail by selecting the Phone app then selecting and holding the 1 key. Select Keypad, then select the Visual Voicemail icon. Select Start. Select Ok. From any Home screen, tap the Menu key. Tap Settings. Tap Call settings. Tap Voicemail. Tap Voicemail again. View the voicemail number. Press and hold the 1 on your device’s dial pad to call and connect to your voicemail. Press the star * key to access the main menu. Press 4 to access the mailbox options. Press 7 to change the language of the voicemail prompts to either Spanish or English.
It offers FREE voice mail greetings for the different people that call your cell phone. It's called youmail. This youmail service can replace your cellular voicemail with a supposedly better voice mail system that includes a set of cool and different features such as different personalized greetings for each caller, online and phonebased