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Ruwan
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SIM Failure, invalid SIM or no SIM card installed

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This is a factory unlocked Apple iPhone 4. It always shows the error "SIM Failure, invalid sim or no sim card installed."

How can I fix it?

Edited by

bushing and Taylor Arnicar

Taylor Arnicar

where did you buy the phone?

Chris Green,

(What country?)

Chris Green,

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tamhoangngo
175

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Try going back to your telecom company and have them replace your sim card. That will typically remedy the issue.

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ravi patel
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I also had the same problem, and I had to get a new iPhone 4.

Edited by

Taylor Arnicar

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