If your internet access is working at all but only for certain services and not others then, almost certainly, that's due to something on your phone as 48 don't block anything.
Nobody has ever reported anyting like this before.
What sort of things work and what do not?
What happens when access fails?
Error messages/screenshots might help.
If necessary contact 48 support for assistance:
http://www.48months.ie/help#ask-a-48-agent
Hope this helps.
