An option with far fewer cables is the RecorderGear PR200. It records your conversation via Bluetooth. The call button in the middle of the device can answer calls on the Bluetooth-connected phone. Hold the PR200 up to your head to talk and listen, as if it's the phone. It also features a USB end to quickly access recordings on the computer. It will hold about 144 hours of conversation before it fills up the 4GB of storage. It also records like any digital recorder sans smartphone, since it has an external pin-hole microphone.
That way you'll get to know exactly what other people hear when they call your phone and one last thing I wanted to show you. If you don't see that play on record option on the bottom, you don't have visual voicemail. Set up on your phone and that's through your provider. So if you have at and T sprint T-Mobile or any other provider, you need to have visual voicemail.

Open the file you want to store.Tap Select, the file name and then Organize, which looks like a little folder.Under “On My [Device name],” choose a folder or tap the icon of a folder with a plus sign to create a new one.Tap Copy and you’re done.
Sound upbeat in your message. When recording, be sure to say your message with a smile on your face. It’s obvious when people aren’t happy in their message. Since your work revolves around keeping happy customers, do your part by keeping a happy-sounding voicemail message.