If your phone says Sim registration failed with your new Moose Sim card inserted it probably is one of the below issues:
A. Your SIM card is not connected yet to Moose
B. Your service has been restricted or barred
C. Your old Sim card is still in the handset and is no longer connected.
To fix this issue firstly turn your handset on and off if it then comes up Yes Optus your up and running. If that doesn't work put your old Sim card back in the phone and make sure you old providers sim card is not still working, if your old sim card is still working the transfer to Moose has not yet completed. If you old providers sim is definitely not working put your Moose Sim back in the phone and CONTACT US to resolve the issue.