The command should produce no output and yout connection should now be active.
[[File:22_39.jpg|800x600px|center|border]]
Your mobile connection should now be active. You can use the connman system tray application (cmst) to check the status of the network connection (: <code>cmst</code> In the Status tab you can see the important bit - AccessPointName = three.co.uk)status of the mobile and WIFI connection.