What Network Do They Use? These are separate, "alternative" companies that use the same wireless networks as the major carriers, usually at a lower price. They're also known as Mobile Virtual Network Operators (MVNO), wholesale carriers, or cellular "re-sellers". You get your phone, plan and customer service from these companies instead of the underlying carrier. Some use more than one network and the type of wireless device determines whether a CDMA or GSM carrier is used.