Explanation:
Option 1: This is invalid because, it is not designed to satisfy the avoidance of dropped calls
Option 2: Low cost provider of mobile phones does not defense on company's profitability
Option 3: The features might not be higher since it is low-cost. So this option is also invalid
Option 4: Low-cost products catches the eyes of the society. Many people need low cost product which would give acceptable performance. This in turn attracts the people and there is a chance of service provider growing good in market.
Option 5: Invalid