Which wireless carrier is best? Many studies are undertaken every year, and while they are interesting and accurate, they often are not that useful in selecting the best carrier for you. Why? Simple. They are generic studies, but you are not a generic customer. If wireless performance were the same for every customer in every location, then the studies would be helpful. However, that's not the case. Every network has stronger and weaker spots, faster and slower spots -- better and worse spots.