A Mobile Virtual Network Operator (MVNO) is a company that provides mobile phone services without owning the physical network infrastructure. Instead, MVNOs partner with established network providers, like Verizon or AT&T, to use their networks. This allows them to offer mobile plans, data services, and other features to customers while keeping costs lower. MVNOs often target specific customer segments, such as budget-conscious users or niche markets. They can provide unique plans and pricing options that cater to different needs, making mobile services more accessible. Examples of MVNOs include Boost Mobile and Cricket Wireless, which offer competitive alternatives to traditional carriers.