No, you do not need a separate cell phone for your business. If you’re an entrepreneur or sole proprietor, you can add a business line to your smartphone by using Talkroute or Grasshopper.  Simply download the respective mobile app to your device, select your number, and enjoy the benefits of a business phone system without having to purchase another phone. All of your incoming calls will be separated, and you can make outgoing business calls through your personal cell phone using the Talkroute or Grasshopper mobile app.