A system for providing a wireless device with access to a computer network includes an access point that sets up a radio link with the wireless device and couples the wireless device to the network. The system also includes a server that receives data packets from the access point through the computer network. The data packets include at least one data packet that has a first identifier that uniquely identifies the wireless device and a second identifier that corresponds to the wireless device. The system further includes a database that is coupled to the server and stores data for associating a service plan with the first and second identifiers and basing the service plan, at least in part, on the second identifier. Other features and systems are also disclosed.