If you are experiencing issues with your SIM Card, we recommend trying the below troubleshooting:
Symptom: Handset reporting NO SIM or INVALID SIM
Step 1: Check that the SIM is inserted correctly as per the Mobile Manual
Step 2: If the SIM is inserted correctly and your handset is still reporting NO SIM, reboot your handset. Turn handset OFF – remove SIM Card for up to 5 minutes – reinsert SIM Card – turn handset ON.
Step 3: If the above reboot does not resolve the issue, if possible, test your SIM Card in another handset as the coverage issues may be related to the handset and not the network.