When deploying managed devices, there will be a few different organizations involved with a different roles and responsibilities. Which of the following parties is required to provide networks, supplying and distributing devices?

Carrier/Device resellers are responsible for providing the network connectivity (carriers) and supplying/distributing the physical devices (resellers) to organizations. These are crucial steps in getting managed devices into the hands of end-users. OEM Manufacturers design and produce the devices, but typically don't handle direct distribution or network services to enterprises. Google develops the Android operating system and provides the Android Enterprise platform, but does not directly supply devices or network services to end-users or organizations. Service Providers might offer IT support or managed services, but they generally don't supply the core network infrastructure or the devices themselves; they work with existing infrastructure and devices.