Airborne base stations (BSs), carried by drones, have a great potential to enhance the coverage and capacity of 6G cellular networks. Researchers propose a unmanned aerial vehicle (UAV)-enabled cellular network setup based on tethered UAVs (tUAVs). n the proposed setup, the tUAV is connected to a GS through a tether, which provides the tUAV with both energy and data. This enables a flight that can last for days. The researchers describe in detail the components of the proposed system, and list the main advantages of a tUAV-enabled cellular net work compared to typical untethered UAVs (uUAVs). They also discuss the potential applications and use cases for tUAVs and provide Monte Carlo simulations to compare the performance of tUAVs and uUAVs in terms of coverage probability.