Modifying a first data connection to support data traffic of a second data connection

A User Equipment (“UE”) apparatus comprising:

• a first interface that supports a first data connection with a first mobile communication network, the first data connection supporting a plurality of quality of service (“QoS”) flows;
• and
• a processor that:
• receives a first request via the first data connection, the first request containing a first set of parameters for establishing a second data connection with an interworking function in a second mobile communication network, wherein data traffic of the second data connection is to be transferred through the first data connection;
• sends a second request to modify the first data connection in response to receiving the first request, the second request containing a second set of parameters derived from the first set of parameters, wherein the second set of parameters modify the first data connection for supporting the data traffic of the second data connection;
• and
• transmits the data traffic of the second data connection through the modified first data connection.