Some choose prepaid cellular phone subscription plans. Some like to know how much they are spending on their phone service before they make a single call, and they choose to use prepaid services because of that. Prepaid services can be a lower cost option for those who do not have a lot of extra money to spend on a phone service and who are not making a lot of calls with their plan, anyway.
Some choose cellular phone subscription plans through companies offering new user discounts. There are times when a person can save money by moving from one phone company to another because of the new user discounts that a company offers. Some will provide a person with a new phone simply for signing up for services, and others will give a person a month of free service or some other type of reward for signing up with them.
Some choose to bundle cellular phone subscription plans with other service plans. There are times when it makes sense for a person to bundle their phone service with their TV or internet service. The person who wants access to a number of services might as well save some money by getting all of those services through one company if there is an offer that lets them do that. It can be simple for a person to pay a single bill at the end of the month, too.
Some really research a company before deciding on cellular phone subscription plans. There are certain companies that offer better services than others when it comes to cellular phone plans. A person wants to know that they can make calls without having those drop and that they will have coverage no matter where they travel. Some will research a company thoroughly before signing up for one of its offered plans.