Smartphones are the most relevant digital companions that we employ on a daily basis and increasingly used by employees to perform business tasks. However, some companies do not allow the use of personal devices to access their IT infrastructure (BYOD) due to security concerns or for other organizational reasons; thus these employees have to use a smartphone provided by the company. Hence, employees may be confronted with unfamiliar operating systems or applications and which may influence their satisfaction and performance. We analyzed these effects by conducting a usability study that measured efficiency, effectiveness, and satisfaction of iOS and Android users when required to use a company provided device (CPD) in the form of a Nokia Lumia Windows Phone compared to their own device when executing the same tasks on their own device. The study used a within-subjects design and three measurement points, each of which consisted of multiple typical business tasks. The study used a within-subjects design and three measurement points each, which consisted of multiple typical business tasks. Results show that users become accustomed to the Company Provides Devices fast, since efficiency and effectiveness improve rapidly. The satisfaction level also improves, but remains below the personal devices.