Tap the Proxy address box and enter 10.1.11.19:8080 then tap Done
Tap the Linger time (sec) box and enter 120 then tap Done
Tap MMS Pay & Go to make it active (a dot should appear next to the active profile)
Press the Back button four times to return to the standby screen.
If after all this your internet is still not working then turn on data roaming within the settings of your phone this will allow you to use the internet. Don't worry about extra charges as we do not support data roaming so if you go onto a different network you will not be charged.