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Q: iphone 4 invalid sim, how to fix it?

how to fix it?

iPhone 4, iOS 6.1.3

Posted on Sep 5, 2013 3:22 PM

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Q: iphone 4 invalid sim, how to fix it?

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  • by AAN2,

    AAN2 AAN2 Sep 5, 2013 3:24 PM in response to Pmpiter
    Level 3 (640 points)
    Sep 5, 2013 3:24 PM in response to Pmpiter

    Try following this article:

     

    http://support.apple.com/kb/TS4148

  • by razmee209,

    razmee209 razmee209 Sep 5, 2013 3:24 PM in response to Pmpiter
    Level 7 (33,215 points)
    Sep 5, 2013 3:24 PM in response to Pmpiter

    What did your carrier say when you contacted them about your invalid sim?

     

    Are you using a supported carrier http://support.apple.com/kb/ht1937

  • by sumitdavdra,

    sumitdavdra sumitdavdra Jan 4, 2016 2:07 AM in response to Pmpiter
    Level 1 (0 points)
    Jan 4, 2016 2:07 AM in response to Pmpiter

    you have got right answer ?

    i have also same problem

  • by lovelulu,

    lovelulu lovelulu May 19, 2016 8:50 AM in response to Pmpiter
    Level 1 (4 points)
    May 19, 2016 8:50 AM in response to Pmpiter

    I am so happy that I finally fix this invalid sim card with iphone4.

     

    What I have:

    - iphone 4

    - iphone 6

    - sim card 1 (invalid for iphone 4, but works on iphone 6. This card's original carrier is from a foreign country)

    - sim card 2 (works for both iphone 4 and iphone 6)

     

     

    What I did:

    - put sim card 2 into iphone 4

    - Settings -> Cellular -> Cellular Data Network

    - Because sim card 2 works for both iphones, then you could see that it has carrier settings like "gprs.carriernameXXX.ch" (e.g. gprs.swisscom.ch)

    - Then, keep your iphone4 staying in this setting page

    - Remove sim card 2

    - Insert sim card 1

    - Then you will see the left-upper-corner of iphone 4 is searching for carrier

    - Wait and patient, then it works for me. iPhone 4 found the same carrier as "gprs.swisscom.ch" for sim card 2.

    - After two minutes, iPhone 4 reminds me to have an update of carrier, i click ok.

     

    I did this, because i noticed that when i insert sim card 1 into iPhone 4, it shows "Carrier not available"  in General->About-> Carrier: Not available

    Then it reminds me that, maybe I could insert a working sim card to record this Carrier setting.

    Because I want my sim card 1 (foreign sim card) working by using the same carrier as sim card 2.

     

    Hope it helps you.

     

    Cheers,

    Lulu