HT201420: If you get an alert about the SIM card in your iPhone

Learn about If you get an alert about the SIM card in your iPhone
dogbot555
Level 1 (0 points)

Q: My iphone 4 has been updated to the newest version, but i constantly tells me that there is no SIM card installed. why does this keep happening?

I have restarted my phone numereous times (because there's nothing else you can do to an iPhone) and every time it turns back on it'll have bars for a little while and then say " No SIM installed"  or it'll go straight to "No SIM".  Why is this happeneing and how can i fix it?

iPhone 4, iOS 5.1.1

Posted on Jul 26, 2012 5:41 PM

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dogbot555

Q: My iphone 4 has been updated to the newest version, but i constantly tells me that there is no SIM card installed. why does this k ... more

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  • by imobl,

    imobl imobl Jul 27, 2012 2:05 PM in response to dogbot555
    Level 5 (7,176 points)
    iPhone
    Jul 27, 2012 2:05 PM in response to dogbot555

    Sounds like your iPhone was hacked/modified/jailbroken to work

    with wireless carrier other than the one it was purchased from. The

    update has relocked it to the original carrier. Contact the original

    carrier to see if they offer unlocking and if you qualify - only the

    carrier to which the iPhone is locked can unlock it.

     

    What does it say when you look at Settings=>General=>Carrier?

     

    Be advised that the previous modifications to change from original carrier

    to your local Carrier may have rendered the software unable to be updated or

    officially unlocked.