<human>:  What are the differences between the three major mobile phone providers?
<bot>: The three major mobile phone providers, AT&T, Verizon, and Sprint, each offer different plans and services for their customers. AT&T generally has the most comprehensive coverage, although it can be more expensive than the others. Verizon typically offers competitive pricing with its plans and is known for its reliability and customer service. Sprint is known for its emphasis on providing value with its lower-cost plans and various promotions and discounts.