A wireless communications apparatus, wherein the wireless communications apparatus is provided for and adapted to perform wireless communication by using a first user identity and a second user identity; the wireless communications apparatus comprising a first communications module associated with a first communication card storing first user identity information and supporting a first wireless communication capability and a second wireless communication capability; the wireless communications apparatus further comprising a second communications module associated with a second communication card storing second user identity information and supporting the second wireless communication capability; and the wireless communications apparatus further comprising the following: an interface circuit, and one or more processors coupled to the interface circuit, wherein the wireless communications apparatus is configured to: deactivate the first wireless communication capability of the first communications module, so that the first communications module does not support the first wireless communication capability; activate a first wireless communication capability of the second communications module, so that the second communications module supports the first wireless communication capability; send a first uplink message through the interface circuit to a network device, wherein the first uplink message is used to indicate that the first user identity does not support the first wireless communication capability; and send a second uplink message through the interface circuit to the network device, wherein the second uplink message is used to indicate that the second user identity supports the first wireless communication capability; wherein - one or more processors of the wireless communications apparatus are configured to: before sending the first uplink message, enable the wireless communications apparatus to perform a cell selection procedure or a cell reselection procedure by using the first user identity, wherein the wireless communications apparatus is to select a cell of the second radio access technology from a cell of the first radio access technology by using the first user identity; - one or more processors of the wireless communications apparatus are configured to: after sending the second uplink message, enable the wireless communications apparatus to perform a cell selection procedure, a cell reselection procedure, or a background scanning procedure by using the second user identity, wherein the wireless communications apparatus is to select a cell of the first radio access technology from a cell of the second radio access technology by using the second user identity. deactivate the first wireless communication capability of the first communications module, so that the first communications module does not support the first wireless communication capability; activate a first wireless communication capability of the second communications module, so that the second communications module supports the first wireless communication capability; send a first uplink message through the interface circuit to a network device, wherein the first uplink message is used to indicate that the first user identity does not support the first wireless communication capability; and send a second uplink message through the interface circuit to the network device, wherein the second uplink message is used to indicate that the second user identity supports the first wireless communication capability; wherein - one or more processors of the wireless communications apparatus are configured to: before sending the first uplink message, enable the wireless communications apparatus to perform a cell selection procedure or a cell reselection procedure by using the first user identity, wherein the wireless communications apparatus is to select a cell of the second radio access technology from a cell of the first radio access technology by using the first user identity; - one or more processors of the wireless communications apparatus are configured to: after sending the second uplink message, enable the wireless communications apparatus to perform a cell selection procedure, a cell reselection procedure, or a background scanning procedure by using the second user identity, wherein the wireless communications apparatus is to select a cell of the first radio access technology from a cell of the second radio access technology by using the second user identity. - one or more processors of the wireless communications apparatus are configured to: before sending the first uplink message, enable the wireless communications apparatus to perform a cell selection procedure or a cell reselection procedure by using the first user identity, wherein the wireless communications apparatus is to select a cell of the second radio access technology from a cell of the first radio access technology by using the first user identity; - one or more processors of the wireless communications apparatus are configured to: after sending the second uplink message, enable the wireless communications apparatus to perform a cell selection procedure, a cell reselection procedure, or a background scanning procedure by using the second user identity, wherein the wireless communications apparatus is to select a cell of the first radio access technology from a cell of the second radio access technology by using the second user identity.