My network doesn't work until now I'm in tallaght
What do you mean?
Was it working before and stopped working?
If so, when?
Or are you just joining 48?
If so, then did you activate your SIM and try it in an unlocked phone?
Any error messages?
If you search for networks can you see and connect to 48?
Does anything work - incoming or outgoing calls? Incoming or outgoing texts? Data?
Basically, you need to post a bit more info if you want assistance from the community forum.
If you need to contact 48 support then see the link in my signature below or email them at email@example.com