Hi, I live in California. My elder brother have gifted me an unlocked cell phone on my this birthday. Now I am looking to buy a sim for my cell phone. I am not very much aware of the plans and services of the cell phone service providers; I want you to suggest me some service providers who also provides Sim Cards for cell phones, having cheap offer with them. I am looking for a sim card in which I have free calling minutes with unlimited data usage.