MVNOs come in various forms, depending on the level of involvement and integration with the MNO's network. Service providers, such as Boost Mobile, Cricket Wireless, and Metro by T-Mobile, use the MNO's network and billing platform but provide their own customer service, marketing, and branding. Resellers like TracFone, Straight Talk, and Net10 simply resell the MNO's service under their own name without any control over the network, pricing, or features. Enhanced service providers like Google Fi, Republic Wireless, and FreedomPop use the MNO's network but have their own billing platform and offer additional services or features not available from the MNO. Lastly, full MVNOs like Virgin Mobile, Ting, and Lycamobile have their own core network components such as switches, servers, and SIM cards but only use the MNO's radio access network. This gives them more control and flexibility over the network and service quality but requires greater investment and expertise.