As emergency services agencies expand the use of connected vehicles, mobile applications, and IoT technologies, ensuring secure and reliable connectivity has become mission-critical. This practical checklist provides a framework for evaluating 5G deployment readiness, network performance requirements, security considerations, scalability, and operational processes. Readers will gain actionable guidance to help align stakeholders, reduce risk, strengthen cybersecurity, and build a resilient network foundation that supports both current operations and future innovation. Whether planning a new deployment or modernizing existing infrastructure, this resource helps agencies make informed decisions that improve connectivity, security, and long-term operational effectiveness.