Topic: is "The evolution of mobile phones (cell phones)"

The first generation of mobile phones was introduced by Motorola 45 years ago.

What has happened in those 45 years?

Is the number of people using mobile phones currently higher or lower?

In other words, has the use of mobile phones become popular or not?

In general, are mobile phones more expensive or cheaper? Why?

What are the reasons that have influenced the use of mobile phones?

What factors mainly determine the production costs of mobile phones?

Attention please,

Remember to answer all the questions asked in your essay using information from reliable sources, and

Present or refer to the scenario (graph) of the supply and demand model that best illustrates each of your arguments. For example, if you affirm that "technological progress resulted in a reduction in costs and that, therefore, the supply of mobile phones increased", you must present or indicate (a) which of the scenarios (graphs) of the supply and demand model It better illustrates an increase in supply and (b) you should also add what is the impact of an increase in supply on prices and quantities consumed.