Network devices receive configuration settings for a portable data account with a service provider. The portable data account provides for mobile data over a broadband cellular network. The network devices receive, via a mobile device, user credentials, for a user, to activate a portable data service for the mobile device. The network devices determine that the user credentials correspond to the portable data account, the portable data account being different than a default account associated with the mobile device. The network devices map a temporary mobile directory number (MDN), which is associated with the portable data account, to a unique identifier for the mobile device, and enforce the configuration settings for a portable data session, associated with the temporary MDN, for the portable data account. The network devices log mobile data, used by the mobile device, for the portable data session and create a billing record for the portable data session, the billing record being based on the logging and associated with the portable data account.