Was it working before today?
Did anything change with the phone? Software update, settings changes, factory reset etc.?
Are you getting a connection to the 48 network? I.e. signal bars?
If not then if you do a manual search for networks can you see and connect to 48?
Have you tried reseating the SIM in case it got dislodged?
If necessary contact 48 support for further assistance.
See the link in my signature below or email them at support@48months.zendesk.com
