The invention discloses a computer-implemented method, computer program product, and computer system, for utilizing a hypervisor installed on a smartphone running separate virtual machines (VMs), one configured for personal use and another for work use, thereby allowing for separate operating environments on one piece of hardware. The method includes receiving one or more notifications, or calls, on the smartphone and determining whether the one or more notifications, or calls, are during work hours. The method selects, automatically, the work VM as default if the one or more notifications, or calls, are during work hours. If the one or more notifications, or calls, are not during work hours, the method automatically selects the personal VM as default. The method further notifies a user to switch VMs if the one or more notifications, or calls, occur during a time that is a non-default VM.