An exemplary mobile device activation system may receive, by way of a mobile device not currently activated on a mobile network, a request to initiate an activation process to activate the mobile device on the mobile network, authenticate the mobile device to a user account associated with the mobile network, establish an activation session with the authenticated mobile device, receive, during the activation session and by way of the authenticated mobile device, user input indicating a user-selected activation parameter for the authenticated mobile device, and activate the authenticated mobile device on the mobile network based on the user-selected activation parameter for the authenticated mobile device.