If your SIM is not working here are a few things you can try: -

Turn your phone off and on again.
Check your SIM card is inserted properly.
Clean your SIM with a lint-free cloth to remove any dust.
Get a PUK code if you’ve entered your PIN incorrectly too many times.

Putting your SIM in a new phone?

If you are, it might be locked to another network. You’ll get an error message or be asked to enter an unlocking code if it is. If your handset is locked, you will need to speak to your previous provider, and they will be able to give you an unlocking code.

FAQs

Why is my SIM not working?

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