A pay as you go phone plan is a type of cell phone plan where you load money onto the phone ahead of time and then use it as you go. The benefits of this type of plan are that you can control your spending, since you can only use the money that you have loaded onto the phone, and it can be a cheaper option than a traditional cell phone plan. The best pay as you go phone plans will vary depending on your needs, but some of the things to look for include low monthly fees, a variety of features, and good customer service.