Cheapest cell phone service in California?

We all keep cell phone for being connected with our friends and family members. I checked for most of the deals but they were just too expensive for all that we hardly use. I finally selected a plan of SPRINT network which is a pre paid one. If u believe me really I am very happy with all its plans and services. I just do pay only $ 90 for full year as the rental charge, its sounds like quite expensive about $ 90, but it covers one full year with unlimited data usage. It costs me 15 cents a minute for all my calls which I make. There are many refills plans, I think they come at $ 20, $ 30, $ 50, $75. When the year is about to end , I pay for another one and the left over time is carried over to the next one. This plan gives me unlimited data usage that helps me to mail my friends and download songs and required documents. And if you are very fond of text messaging, as I am not, for that you will have to pay only 4.9 cents per text message. If you believe words of my you will be very happy with this network.