Troubleshooting SIM card problems

A SIM card is the small, flat piece of plastic that connects your device to your network. If you're getting error messages relating to your SIM on your device, they can often be solved in the following ways:

The SIM might be out of place. If you've recently dropped, bumped, or opened your device it may need adjusting. Follow the SIM card installation instructions in your device's user guide.
Your PUK (Personal Unblocking Key) code may have been entered incorrectly too many times. See our PIN and PUK page for more information.
You've recently changed networks. Your SIM card or device may be configured for your previous network and will need to be reconfigured. Contact your current network for assistance.
Sometimes dust can get between the SIM and your phone causing communication issues, to remove the dust:
- Turn off your phone and remove the SIM card.
- Clean the gold connectors on the SIM with a clean lint-free cloth.
- Replace the battery and turn your phone on without the SIM.
- Turn your phone off, replace the SIM and restart the phone