To do a research paper on, need a lot of time and will face many difficulties. the survey will be difficult to implement. Data analysis is one of the difficulties of the study. Some customers will be able to not give ideas to improve the quality of the paper. This means that it will take a lot of time to select them.
The number of customers using smartphones more and more, and no sign will be stable or decreasing. This means that the quality of service needs to be improved as to maintain the strength to compete with other rivals.
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