This disclosure is directed to techniques for directly managing, via a cellular modem device, an in-home Internet service subscription plan for using an in-home Internet service from a wireless carrier network. The cellular modem device may facilitate adjustment of the in-home Internet subscription plan by monitoring Internet service usage at the cellular modem device and then comparing a monitored Internet service usage with a corresponding threshold value. Based on this comparison, the cellular modem device may present to the subscriber a selection that correspond to different adjustments in the subscription plan. The cellular modem device may then send a request for adjustment to Internet service provider based on a user-entered selection and a notification is thereafter received by the cellular modem device for the adjustment of the subscription plan by the Internet service provider.