Radio communication

(canceled)

(canceled)

17-21. (canceled)

A radio communication system comprising an electronic device configured for communication over a cellular telecommunications network, wherein:

• the electronic device is configured to send a session control signal to the cellular telecommunications network, or is configured to receive a session control signal from the cellular telecommunications network, on a first radio channel provided by the cellular telecommunications network, the session control signal comprising identification data identifying a remote party for an IP-based communication session with the remote party;
• and
• the electronic device is configured to send content data, for an IP-based communication session established with the remote party by the cellular telecommunications network, to the cellular telecommunications network, or is configured to receive content data, for an IP-based communication session established with the remote party by the cellular telecommunications network, from the cellular telecommunications network, on a second radio channel provided by the cellular telecommunications network.

A method of communicating message data over a cellular telecommunications network using an electronic device, wherein the method comprises:

• communicating a message signal between the electronic device and the cellular telecommunications network on a non-IP radio channel provided by the cellular telecommunications network, the message signal encoding message data;
• and
• the cellular telecommunications network sending the message data to a remote party over an IP-based communication channel, or receiving the message data from a remote party over an IP-based communication channel.

(canceled)