You'll need to provide a bit more information and context than that if you want assistance from the Community Forum.
Was the phone working with a different 48 SIM previously?
Did you get a replacement SIM?
If so, why?
What exactly happens when the 48 SIM is installed in the phone?
Any error messages?
Does anything work?
Connection to the 48 network - i.e. signal bars?
Incoming/outgoing calls?
Incoming/outgoing texts?
Mobile data?
Is the phone unlocked for use on any network?
What make and model of phone is it?
If you need to contact 48 support about this then see the links in my signature below.
