Want to get the absolute best cellular plan for your Nexus 4? As all American cellular users know, carriers charge budget-breaking prices for smartphone plans. The only way to save money is through cellular wholesalers who lease broadcast spectrum from the major networks and sell to the little guy at a substantial discount. Yeah, I know it sounds like a scam. It's not. Just buy the prepaid SIM card from an Mobile Virtual Network Operator (MVNO) and cut your cell bill in half.