While recording a message, make sure that you don’t yell into the phone and make sure you record in a quiet place. Setting this up in a restaurant will make your iPhone voicemail greeting sound like you are actually picking up the phone.
Pro tip: You can double-check to see if voicemail is set up on your iPhone by dialing and calling your own phone number in the Keypad of the Phone app, or by calling your iPhone using another phone.

1. From standby mode or the Phone application on select Sprint phones, press and hold the Envelope key on your phone until the display reads Connecting… (your Sprint phone number), or press and hold the 1 key until the display reads Connecting… (your Sprint phone number).
To call your voicemail on an Android phone, simply open your phone’s dial pad and hold your finger down on the “1” key. You can also call your voicemail from a different phone by calling your own number and tapping the pound key. Navigate to your voicemail option if using a cell phone. … Listen to the recorded voicemail instructions. … Press the number on your keypad symbolizing “Yes” when asked if you want to delete your current message. … Select to record your own message if you want, or leave it as the mechanic default message. Step 1: Press # Right after you realize you want to delete your voicemail press the # symbol. It is VERY important that you do not hang up the phone. … Step 2: Listen to Menu. Once you press # on your phone, you will automatically be given access to a menu.