The Blu Dash 5.0+ comes with android OS and setting up the voicemail is an easy work on it. You need to press the phone tab on the main screen. You will press the voicemail button available on the bottom of the screen and that will connect you to your voice mail box. If the positioning of the buttons are different due to you custom UI, you can cross check from your user manual. The voicemail box will ask you for certain steps, which when followed would lead to a successful setup. You can even call your customer care for the trouble shooting of the voicemail box problem faced earlier.