Answer:
The effect is a decrease in the use of land line phones, so there is a decrease in demand for land line phones and an increase in demand for cellular phones.
Step-by-step explanation:
With the popularization of the cell phone, there was an economic effect caused by the increase in demand for cell phones and the decrease in demand for landlines, which means that the landline sector was affected by changes in consumer taste and preferences, which led to many fixed-line operators migrate to a focus on mobile telephony.
With the popularization of cell phones, it is also possible to notice the increase in industries that produce increasingly technological and differentiated devices to meet this constantly growing demand.