This document is a survey report from tyntec about bring your own device (BYOD) usage. It summarizes the key findings of a survey of over 1,300 employees from the US, UK, and Spain. The main findings are that most employees now use their personal mobile phones for work purposes, there is a lack of formal BYOD policies at most companies, and employees are concerned about privacy and reimbursement for work-related mobile usage. The report provides recommendations for companies to address the use-policy gap and balance business needs with employee preferences regarding BYOD.