HT202340: iPhone: Understanding SIM cards

Learn about iPhone: Understanding SIM cards
AmyG
Level 1 (0 points)

Q: Invalid SIM message on phone

Do you know how to fix this. Cannot make or receive calls

Invalid SIM

iPhone 4S, iOS 5.1.1

Posted on Sep 16, 2012 10:01 AM

by stevejobsfan0123,Solvedanswer
stevejobsfan0123 stevejobsfan0123
Level 8 (44,007 points)
iPhone
A:

Try resetting:
Hold the home and power buttons at the same time until the Apple boot logo appears. No data will be lost.

 

If that fails, try taking the SIM out (you will need a paper clip or SIM unlock tool to open the SIM tray), then reset again. After powering back on it should say No SIM. Then try putting the SIM back in.

 

If it is still not fixed, seek help from your carrier or from Apple at an Apple Store.

Posted on Sep 16, 2012 10:39 AM

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Q: Invalid SIM message on phone

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