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Make the most of your iPhone 5s

We can help you get the best from your Apple iPhone 5s. Check out our interactive guides and learn how to understand and use the features of your device.

Guides Troubleshooting Specifications

I can't turn on my mobile phone

Possible cause 7 of 10:

Your SIM is faulty

If your SIM is faulty, the display will tell you that your SIM isn't accepted.


What you need to do

Check if your SIM is faulty by inserting it in another mobile phone. If your SIM is not accepted by the other mobile phone, your SIM is probably faulty. Contact customer service or find an Optus dealer near you using our Store Locator to order a new SIM.


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iPhone 5s