answer:It’s pretty much how you describe it. The radio spectrum is the part of the electromagnetic spectrum corresponding to radio frequencies (electromagnetic spectrum covers all possible frequencies of electromagnetic radiation the bottom end is radio, then there’s microwaves, infrared, visible light, ultraviolet light, x-rays and gamma rays). Therefore there is only a limited amount of frequencies radio transmissions can use there is a limit to the amount of data that can be transmitted via radiowaves at single time. This is reduced further because parts of the spectrum are reserved for specific uses for example radar, aircraft communications, marine communications, CB radios. Therefore there is only a limited amount of space for mobile phones to use. Because there has been an increase both in the number of people using mobile data because of the increase in smartphones and mobile hotspots etc and the type of data such as streaming movies and TV it is getting close to the point where there will be too much traffic for mobile phone networks to function. Think of midnight on new years eve when you try to call people and wish them a happy new year but cant get through because everyone else is calling at the same time – it’ll be like that all the time. One solution is to increase the amount of spectrum available for mobile phones by reducing spectrum available to other things. Another method is to limit the amount of data each individual uses by charging per 1Gb of data used. A more long term solution would be improve the efficiency of the way data is transmitted so more data can be sent at the same time.