When using mobile phones or other devices to surf the Internet, there is usually a data traffic limit, that is, the Internet traffic included in the package. Internet access fee outside the package refers to the cost of continuing to use the network when the user exceeds the range of Internet traffic included in the package. This means that users will have to pay extra fees to cover the data usage beyond the limit of the package. The calculation method of internet access fee outside the package is usually stipulated by the operator, which may be based on the amount of data used or the time.