The first clear advantage of using a Dual-SIM device is that it allows the user to separate their personal and business lines. This is a bonus in multiple ways, including the ability to keep work contacts and personal contacts separate. This also removes the need to carry around multiple devices.
Another clear bonus is that the user no longer needs to swap out SIM cards to use them. Access between each one can easily be activated or disabled via a few simple button presses.
Furthermore, you will be able to easily review each activities of the respective phone numbers on the device. This allows for simpler tracking of professional finances.