REVIEW OF RELATED LITERATURE
This chapter presents the related literature-local and foreign which helped the researcher conceptualize the effects of cell phone use of students during classes. In addition to the related literature are local and foreign studies that helped the researcher in the analysis of the problems under study. It has provided an insight to enrich this investigation and understanding of the study’s problem.
In today's world, most people communicate through the use cellular phones. It's hard to believe that fifteen years ago cell phones were a rarity. People may not be aware of what is the history chronicling the dawn of the cell phone to its current state.
According to www.symatech.net, the history of cell phone truly began with the creation of radio technology. Two-way radios were, after all, the ancestors of the cell phone. It wasn’t until the 1950s that what people would recognize as a cell phone was created. These were the cell phones that allowed direct dialing. These phones, called the MTA for Mobile Telephone System A, were created by Erickson and were released in 1956 in Sweden. They were very heavy and bulky, and the phones were usually stalled in cars. Only about 150 people used the MTA system. In 1957, Leonid Kupriyanovich created the radiophone, or a wearable mobile phone, in the USSR. These phones required a base station to operate, but each base station could be used by several customers. His phone weighed only 0.5 kg, making it much more portable than the MTA.
The First Generation, or 1G, or the first truly portable cellular phone began in 1983. It was called the Motorola DynaTAC 8000X. The FCC approved it for use in the United States. Motorola developed the technology for cellular phones for decades and this particular phone took 15 years to come to market at an expense of over 100 million dollars in research costs. The DynaTAC800X was extremely lightweight for its...