In some other examples, both the second receiving module 210 and the second sending module 220 may include pure hardware modules, and the pure hardware module includes, but is not limited to the application-specific integrated circuit.

In some examples, the SIM card information is used by the first device to send a network access request to the network.

The second receiving module 210 is further configured to receive the authentication request, where the authentication request is returned by the base station based on the network access request, and transferred by the first device through the interactive channel.

The device further includes: a generating module, configured to generate an authentication response for the first device in response to the authentication request.

The second sending module 220 is configured to return the authentication response to the first device through the interactive channel, where the authentication response is used by the first device to perform authentication verification of the cellular mobile communication connection with the base station.

In some examples, the SIM card information is also used by the first device to generate an authentication response. For example, the SIM card information is also used by the first device to generate the authentication response, where the authentication response is used to reply the authentication request returned after the first device sends a network access request based on the SIM card information.

In some examples, the SIM card sharing device further includes: a third determining module, configured to determine whether the second device enters the Share-SIM server mode.