Each data plan has a monthly limit. Data use is logged each day. When more than one line of service has the same data plan, the data allotment is pooled for use by all lines on the same plan. If the modem data use exceeds the plan limit for a month, an email will be sent to notify the customer contact. When overage charges beyond the pool limit reach $50.00, customers will be notified and billed. Data overage charges are billed at the following rate: $1.00/MB or $0.10/MB for 250 MB+ domestic plans. For more information, see Cellular Data Service Plan Terms and Conditions and Customer Agreement.