One of the most annoying things about cell phone carriers is the way you can feel forced into a long-term contract before even knowing exactly how much the service actually works for you — then dealing with the hassle of customer service calls, set-up fees, cancellation fees and the rest. Tello is a different kind of service plan for your phone: this affordable carrier is designed with flexibility and ease of use in mind, allowing you to customize your plan to suit your needs.