This document is a frequently asked questions guide addressing the future spectrum needs for mobile connectivity, particularly focusing on 6G. It outlines the importance of long-term planning for spectrum allocation to support the anticipated growth in mobile traffic and the deployment of 6G networks by 2030. The document explains why the GSMA presents a range of spectrum needs instead of exact figures, highlighting the inherent uncertainties in long-term forecasts. It details the necessity for mobile operators to have sufficient mid-band spectrum available before 2035 to prevent network congestion and ensure service quality. Additionally, the guide discusses the implications of urban population density on spectrum needs and the role of emerging technologies in driving data demand. It also addresses the limitations of mmWave spectrum and the inclusion of Fixed Wireless Access (FWA) in traffic forecasts, emphasizing the distinct characteristics of FWA compared to traditional mobile networks.