Xfinity Home Security does not strictly require an Xfinity Internet connection to operate. The system is designed to work using cellular and Wi-Fi connections for monitoring and control. However, having Xfinity Internet can enhance the overall experience. It may provide a more stable and reliable connection, allowing for seamless remote access to security features through the associated mobile app or web portal. Additionally, relying solely on cellular connectivity may introduce challenges in certain circumstances, such as limited coverage or higher data costs, depending on the specific plan. For the best results and features, users often benefit from an integrated package with Xfinity Internet. For specific service requirements and options, it is advisable to check the official Xfinity website for the most current information.